like: phát đi tín hiệu cầu cứu
Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
phát đi tín hiệu cầu cứu * ☊ 
to send out a distress signal * ☊
[ phát ] : to distribute, send out, become; [CL for gunshots, abrupt actions]
[ đi ] : to go; (particle used to form commands, suggestions)
[ hiệu ] : store, shop; sign, signal, mark, brand, trademark
[ đi ] : go