{"id":1540,"date":"2022-09-07T09:12:59","date_gmt":"2022-09-07T02:12:59","guid":{"rendered":"https:\/\/ctd-security.com\/?p=1540"},"modified":"2022-09-07T09:22:06","modified_gmt":"2022-09-07T02:22:06","slug":"ngan-chan-hiem-hoa-an-ninh-tu-may-bay-khong-nguoi-lai","status":"publish","type":"post","link":"https:\/\/ctd-security.com\/en\/ngan-chan-hiem-hoa-an-ninh-tu-may-bay-khong-nguoi-lai\/","title":{"rendered":"Security threats from drones"},"content":{"rendered":"<div class=\"row\"  id=\"row-652876021\">\n\n\n\t<div id=\"col-823577870\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n<h4><strong>M\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i v\u00e0 v\u1ea5n \u0111\u1ec1 an ninh<\/strong><\/h4>\n<div>M\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i UAV (Unmanned aerial vehicle) \u2013 c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi t\u00ean g\u1ecdi ph\u1ed5 bi\u1ebfn l\u00e0 Drone, l\u00e0 nh\u1eefng ph\u01b0\u01a1ng ti\u1ec7n bay ho\u1ea1t \u0111\u1ed9ng t\u1ef1 l\u1eadp kh\u00f4ng c\u1ea7n ng\u01b0\u1eddi \u0111i\u1ec1u khi\u1ec3n \u1edf bu\u1ed3ng l\u00e1i. Tr\u01b0\u1edbc \u0111\u00e2y,thi\u1ebft b\u1ecb n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong qu\u00e2n s\u1ef1. Tuy nhi\u00ean, do \u1ea3nh h\u01b0\u1edfng c\u1ee7a l\u00e0n s\u00f3ng c\u00f4ng ngh\u1ec7 4.0, ch\u00fang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i h\u01a1n cho c\u00e1c m\u1ee5c \u0111\u00edch d\u00e2n s\u1ef1, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong truy\u1ec1n h\u00ecnh, \u0111\u1ecba l\u00fd, k\u1ef9 thu\u1eadt kh\u00f4ng gian. Th\u1ecb tr\u01b0\u1eddng drone v\u00ec th\u1ebf ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng, d\u1eabn \u0111\u1ebfn s\u1ef1 xu\u1ea5t hi\u1ec7n h\u00e0ng lo\u1ea1t c\u1ee7a c\u00e1c lo\u1ea1i drone th\u01b0\u01a1ng m\u1ea1i.<\/div>\n<div>&nbsp;<\/div>\n<div>Kh\u00f4ng th\u1ec3 ph\u1ee7 nh\u1eadn, s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a m\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i \u0111\u00e3 t\u1ea1o ra m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p gi\u00e1m s\u00e1t- ti\u1ebfp c\u1eadn \u2013 thu th\u1eadp th\u00f4ng tin ho\u00e0n to\u00e0n m\u1edbi v\u1edbi nh\u1eefng \u01b0u \u0111i\u1ec3m nh\u01b0: d\u1ec5 d\u00e0ng v\u1eadn h\u00e0nh ngay c\u1ea3 \u1edf nh\u1eefng khu v\u1ef1c \u0111\u1ecba h\u00ecnh ph\u1ee9c t\u1ea1p, h\u1eefu d\u1ee5ng trong c\u00e1c t\u00ecnh hu\u1ed1ng kh\u1ea9n c\u1ea5p, ti\u1ebft ki\u1ec7m chi ph\u00ed s\u1ea3n xu\u1ea5t \u2013 b\u1ea3o tr\u00ec, h\u1ea1n ch\u1ebf t\u1ef7 l\u1ec7 th\u01b0\u01a1ng vong trong t\u00e1c chi\u1ebfn\u2026Tuy nhi\u00ean,vi\u1ec7c s\u1eed d\u1ee5ng drone mang t\u00ednh t\u1ef1 ph\u00e1t c\u0169ng nh\u01b0 s\u1ef1 thi\u1ebfu ch\u1eb7t ch\u1ebd trong c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd s\u1edf h\u1eefu lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0y s\u1ebd ti\u1ec1m \u1ea9n nhi\u1ec1u nguy c\u01a1 kh\u00f3 l\u01b0\u1eddng g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tr\u1eadt t\u1ef1 an to\u00e0n x\u00e3 h\u1ed9i v\u00e0 an ninh qu\u1ed1c gia.<\/div>\n<div>&nbsp;<\/div>\n<div>Khi \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh trong khu v\u1ef1c d\u00e2n c\u01b0, drone c\u00f3 th\u1ec3 b\u1ecb r\u01a1i ho\u1eb7c va ch\u1ea1m v\u1edbi ng\u01b0\u1eddi, ph\u01b0\u01a1ng ti\u1ec7n, \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n, ho\u1eb7c c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng. Flycam ( m\u1ed9t lo\u1ea1i drone \u0111\u01b0\u1ee3c trang b\u1ecb camera) th\u1eadm ch\u00ed c\u00f2n tr\u1edf th\u00e0nh n\u1ed7i \u00e1m \u1ea3nh quy\u1ec1n ri\u00eang t\u01b0 v\u00ec ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 quay l\u00e9n v\u00e0 do th\u00e1m c\u00f4ng ngh\u1ec7. \u0110\u00e1ng lo h\u01a1n, do c\u00f3 t\u1ea3i tr\u1ecdng l\u00ean \u0111\u1ebfn v\u00e0i kilogam, drone tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 bu\u00f4n l\u1eadu gi\u00fap chuy\u00ean ch\u1edf ch\u1ea5t c\u1ea5m, v\u0169 kh\u00ed, ma t\u00fay\u2026Nghi\u00eam tr\u1ecdng nh\u1ea5t l\u00e0 c\u00e1c th\u1ebf l\u1ef1c th\u00f9 \u0111\u1ecbch c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i \u0111\u1ec3 x\u00e2m nh\u1eadp, theo d\u00f5i c\u01a1 quan ch\u00ednh ph\u1ee7 v\u00e0 khu v\u1ef1c qu\u00e2n s\u1ef1; th\u1ef1c hi\u1ec7n kh\u1ee7ng b\u1ed1 ( th\u1ea3 bom, t\u00e1c nh\u00e2n h\u00f3a h\u1ecdc ho\u1eb7c t\u00e1c nh\u00e2n sinh h\u1ecdc\u2026); \u0111\u00e1nh l\u1ea1c h\u01b0\u1edbng v\u00e0 g\u00e2y n\u00e1o lo\u1ea1n \u0111\u00e1m \u0111\u00f4ng; r\u1ea3i \u0111\u01a1n tuy\u00ean truy\u1ec1n ch\u1ed1ng ph\u00e1 nh\u00e0 n\u01b0\u1edbc.<\/div>\n<div>&nbsp;<\/div>\n<div>Do \u0111\u00f3, b\u00ean c\u1ea1nh vi\u1ec7c th\u1eaft ch\u1eb7t h\u00e0nh lang ph\u00e1p l\u00ed, vi\u1ec7c nghi\u00ean c\u1ee9u v\u00e0 \u0111\u01b0a ra c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt nh\u1eb1m ph\u00e1t hi\u1ec7n v\u00e0 ch\u1ebf \u00e1p thi\u1ebft b\u1ecb bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i l\u00e0 c\u1ea7n thi\u1ebft v\u00e0 c\u1ea5p b\u00e1ch, kh\u00f4ng ch\u1ec9 \u1edf ri\u00eang Vi\u1ec7t Nam m\u00e0 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi.<\/div>\n<div>&nbsp;<\/div>\n<div>&nbsp;<\/div>\n<div>M\u1ed9t lo\u1ea1i m\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng c\u1ea5t c\u00e1nh l\u00ean \u0111\u1ebfn 4.0kg, c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng chuy\u00ean ch\u1edf nh\u1eefng g\u00f3i h\u00e0ng c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9.<\/div>\n<div>Nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n m\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i<\/div>\n<div>Nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n \u0111\u1ea7u ti\u00ean l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n quang h\u1ecdc ho\u1eb7c \u00e2m thanh. Ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng camera, \u1ed1ng nh\u00f2m, c\u1ea3m bi\u1ebfn nhi\u1ec7t ho\u1eb7c micro \u0111\u1ecbnh h\u01b0\u1edbng si\u00eau nh\u1ea1y \u0111\u1ec3 ph\u00e1t hi\u1ec7n drone th\u00f4ng qua b\u1ee9c x\u1ea1 nhi\u1ec7t ho\u1eb7c \u00e2m thanh ph\u00e1t ra t\u1eeb \u0111\u1ed9ng c\u01a1. Tuy nhi\u00ean, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ch\u1ec9 c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n t\u1ea7m g\u1ea7n, d\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi m\u00f4i tr\u01b0\u1eddng v\u00e0 \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft n\u00ean c\u00f3 sai s\u1ed1 cao.<\/div>\n<div>&nbsp;<\/div>\n<div>Do \u0111\u00f3, radar t\u1ea7m th\u1ea5p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n drone. Radar ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u00f4 v\u00f4 tuy\u1ebfn si\u00eau cao t\u1ea7n, c\u00f3 b\u01b0\u1edbc s\u00f3ng si\u00eau ng\u1eafn, ph\u00e1t ra kh\u00f4ng gian m\u1ed9t lu\u1ed3ng h\u1eb9p d\u01b0\u1edbi d\u1ea1ng xung. Trong qu\u00e1 tr\u00ecnh lan truy\u1ec1n, s\u00f3ng radar g\u1eb7p b\u1ea5t k\u1ef3 m\u1ee5c ti\u00eau n\u00e0o th\u00ec ch\u00fang s\u1ebd ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i. B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch v\u1eadn t\u1ed1c s\u00f3ng, th\u1eddi gian ph\u1ea3n x\u1ea1 ; ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed v\u00e0 h\u01b0\u1edbng di chuy\u1ec3n c\u1ee7a drone v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c cao. Tuy nhi\u00ean, hi\u1ec7u qu\u1ea3 c\u1ee7a radar l\u1ea1i b\u1ecb h\u1ea1n ch\u1ebf trong khu v\u1ef1c n\u1ed9i \u0111\u00f4 c\u00f3 nhi\u1ec1u v\u1eadt che ch\u1eafn. V\u00ec v\u1eady, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 nghi\u00ean c\u1ee9u ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n m\u1edbi d\u1ef1a tr\u00ean nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a drone.<\/div>\n<div>&nbsp;<\/div>\n<div>Drone th\u01b0\u1eddng \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh theo hai c\u00e1ch: (1) t\u1ef1 \u0111\u1ed9ng bay theo l\u1ed9 tr\u00ecnh c\u00e0i \u0111\u1eb7t tr\u01b0\u1edbc d\u1ef1a tr\u00ean t\u1ecda \u0111\u1ed9 GPS;&nbsp; (2) bay theo l\u1ec7nh t\u1eeb trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n m\u1eb7t \u0111\u1ea5t trong th\u1eddi gian th\u1ef1c truy\u1ec1n qua \u0111\u01b0\u1eddng truy\u1ec1n v\u00f4 tuy\u1ebfn. V\u00ec v\u1eady, \u1edf m\u1ed9t m\u1ee9c \u0111\u1ed9 n\u00e0o \u0111\u00f3, lu\u00f4n lu\u00f4n t\u1ed3n t\u1ea1i t\u00edn hi\u1ec7u truy\u1ec1n d\u1eabn gi\u1eefa drone v\u1edbi v\u1ec7 tinh GPS ho\u1eb7c v\u1edbi trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111i\u1ec3m m\u1ea5u ch\u1ed1t \u0111\u1ec3 c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n d\u1ef1a tr\u00ean ph\u01b0\u01a1ng ph\u00e1p s\u00f3ng v\u00f4 tuy\u1ebfn (RF). H\u1ec7 th\u1ed1ng n\u00e0y s\u1eed d\u1ee5ng c\u00e1c m\u00e1y thu v\u00f4 tuy\u1ebfn \u0111\u1ed9 nh\u1ea1y cao \u0111\u1ec3 thu th\u1eadp t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ebfn drone. C\u00f3 th\u1ec3 n\u00f3i, \u0111\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 nh\u1ea5t, gi\u00fap ph\u00e1t hi\u1ec7n m\u1ee5c ti\u00eau \u1edf c\u1ef1 ly xa, \u00edt ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi ti\u1ebft, m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao, ph\u00f9 h\u1ee3p \u0111\u1ec3 tri\u1ec3n khai \u1edf nhi\u1ec1u \u0111\u1ecba h\u00ecnh.<\/div>\n<div>&nbsp;<\/div>\n<div>H\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n m\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i b\u1eb1ng radar v\u00e0 b\u1ed9 ph\u00e2n t\u00edch ph\u1ed5<\/div>\n<div>&nbsp;<\/div>\n<div>Nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p ch\u1ebf \u00e1p m\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i&nbsp;<\/div>\n<div>C\u00f3 03 ph\u01b0\u01a1ng h\u01b0\u1edbng x\u1eed l\u00fd \u0111\u01b0\u1ee3c v\u1ea1ch ra sau khi ph\u00e1t hi\u1ec7n s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a m\u00e1y bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i l\u00e0:<\/div>\n<ul>\n<li>Ph\u00e1 h\u1ee7y m\u1ee5c ti\u00eau&nbsp; (destroying)<\/li>\n<li>L\u00e0m m\u1ea5t quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n c\u1ee7a m\u1ee5c ti\u00eau (jamming)<\/li>\n<li>Chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n c\u1ee7a m\u1ee5c ti\u00eau (spoofing).<\/li>\n<\/ul>\n<div>Spoofing \u0111\u01b0\u1ee3c coi l\u00e0 gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u nh\u1ea5t \u0111\u1ec3 \u0111\u1ed1i ph\u00f3 v\u1edbi s\u1ef1 x\u00e2m nh\u1eadp b\u1ea5t h\u1ee3p ph\u00e1p c\u1ee7a drone. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y gi\u00fap can thi\u1ec7p v\u00e0o d\u1ea3i t\u1ea7n \u0111i\u1ec1u khi\u1ec3n c\u1ee7a drone, sau \u0111\u00f3 gi\u1ea3i m\u00e3, gi\u1ea3i \u0111i\u1ec1u ch\u1ebf giao th\u1ee9c \u0111\u01b0\u1eddng truy\u1ec1n \u0111\u1ec3 chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n. Tuy nhi\u00ean, \u0111i\u1ec1u n\u00e0y ch\u1ec9 t\u1ed3n t\u1ea1i tr\u00ean l\u00fd thuy\u1ebft v\u00ec hi\u1ec7n nay g\u1ea7n nh\u01b0 ch\u01b0a c\u00f3 h\u00e3ng nghi\u00ean c\u1ee9u n\u00e0o c\u00f3 th\u1ec3 x\u00e2m nh\u1eadp v\u00e0o m\u00e3 h\u00f3a \u0111\u1ed9c quy\u1ec1n c\u1ee7a c\u00e1c h\u00e3ng s\u1ea3n xu\u1ea5t drone.<\/div>\n<div>&nbsp;<\/div>\n<div>Trong khi \u0111\u00f3, ph\u00e1 h\u1ee7y drone l\u1ea1i l\u00e0 bi\u1ec7n ph\u00e1p th\u00f4 s\u01a1 nh\u1ea5t trong c\u00e1c ph\u01b0\u01a1ng h\u01b0\u1edbng \u0111\u01b0\u1ee3c n\u00eau.&nbsp; L\u1ef1c l\u01b0\u1ee3ng b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng s\u00fang laser, t\u00ean l\u1eeda, chim hu\u1ea5n luy\u1ec7n ho\u1eb7c drone \u0111\u1ec3 b\u1eafn h\u1ea1 ho\u1eb7c t\u1ea5n c\u00f4ng m\u1ee5c ti\u00eau.&nbsp; Tuy d\u1ec5 th\u1ef1c hi\u1ec7n, bi\u1ec7n ph\u00e1p n\u00e0y l\u1ea1i kh\u00e1 t\u1ed1n k\u00e9m, mang t\u00ednh b\u1ecb \u0111\u1ed9ng v\u00e0 kh\u00f4ng gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c t\u1eadn g\u1ed1c v\u1ea5n \u0111\u1ec1 n\u1ebfu drone \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi m\u1ee5c \u0111\u00edch g\u00e2y n\u00e1o lo\u1ea1n, kh\u1ee7ng b\u1ed1 ho\u1eb7c r\u1ea3i \u0111\u01a1n tuy\u00ean truy\u1ec1n ch\u1ed1ng ph\u00e1.<\/div>\n<div>&nbsp;<\/div>\n<div>V\u00ec v\u1eady, jamming \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p an to\u00e0n, hi\u1ec7u qu\u1ea3 v\u00e0 d\u1ec5 th\u1ef1c hi\u1ec7n nh\u1ea5t \u0111ang \u0111\u01b0\u1ee3c tri\u1ec3n khai trong th\u1ef1c t\u1ebf. \u0110\u1ea7u ti\u00ean, c\u00e1c h\u1ec7 th\u1ed1ng v\u00f4 tuy\u1ebfn \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u00e1m s\u00e1t m\u1ee5c ti\u00eau drone. Sau \u0111\u00f3, d\u00f9ng drone gun ho\u1eb7c h\u1ec7 th\u1ed1ng anten \u0111\u1ecbnh h\u01b0\u1edbng \u0111\u1ec3 ph\u00e1t ra ch\u00f9m s\u00f3ng RF c\u00f3 c\u00f4ng su\u1ea5t l\u1edbn v\u00e0 t\u1ea7n s\u1ed1 ph\u00f9 h\u1ee3p v\u1ec1 ph\u00eda drone m\u1ee5c ti\u00eau, l\u00e0m nhi\u1ec5u s\u00f3ng \u0111i\u1ec1u khi\u1ec3n. Drone sau khi m\u1ea5t t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n s\u1ebd quay v\u1ec1 v\u1ecb tr\u00ed xu\u1ea5t ph\u00e1t ban \u0111\u1ea7u ho\u1eb7c ph\u1ea3i h\u1ea1 c\u00e1nh xu\u1ed1ng m\u1eb7t \u0111\u1ea5t theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng.<\/div>\n<div>&nbsp;<\/div>\n<div><strong>K\u1ebft lu\u1eadn<\/strong><\/div>\n<div>M\u1ed7i ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n v\u00e0 ch\u1ebf \u00e1p n\u00eau tr\u00ean \u0111\u1ec1u c\u00f3 \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang. \u0110\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 b\u1ea3o v\u1ec7 tr\u01b0\u1edbc s\u1ef1 t\u1ea5n c\u00f4ng c\u1ee7a thi\u1ebft b\u1ecb bay kh\u00f4ng ng\u01b0\u1eddi l\u00e1i, c\u1ea7n c\u00f3 s\u1ef1 k\u1ebft h\u1ee3p v\u00e0 h\u1ed7 tr\u1ee3 kh\u00e9o l\u00e9o t\u1eeb c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau.<\/div>\n\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":1544,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1540","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - 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