báo đông ứng trực trên không 
air alert [ báo ] : (1) to announce, report; (2) newspaper; (3) panther; (4) to return, give back
[ đông ] : (1) to freeze; winter; (2) to be crowded, large (family); (3) east, eastern, orient, Asia
[ ứng ] : to respond
[ trực ] : to be ready, straight, honest
[ trên ] : in, on; aforementioned, above, over, throughout
[ không ] : (1) no, not; (question tag); (2) air; (3) empty
Most Common Compounds Set 1:
Most Common Compounds Set 2 :