like: khảo tra
Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
khảo tra * ☊ 
investigate * ☊
[ khảo ] : to do research; to examine, test (students); torture, extort
[ tra ] : (1) to consult, look up; (2) to fit in; (3) to add; (4) to apply