HSK 3.0 11000 CHINESE WORDS
ENGLISH 6000 THEME WORDS
OXFORD 5000 CORE WORDS
TANAKA 6000 CORE WORDS
đóng góp vào cụoc điều tra 
to contribute to, take part in an investigation
[ đóng ] : to close, shut, build, drive (nail), play, act (in a play)
[ góp ] : to accumulate, gather, contribute, pool, collect
[ vào ] : at, on (date), in, to; to enter, go in, access
[ điều ] : (1) thing, matter, item; article (of penal code, constitution); (2) smoking pipe; (3) bird [=chim]
[ tra ] : (1) to consult, look up; (2) to fit in; (3) to add; (4) to apply
đóng góp vào cụoc điều tra to contribute to, take part in an investigation [ góp ] : to accumulate, gather, contribute, pool, collect
[ vào ] : at, on (date), in, to; to enter, go in, access
[ điều ] : (1) thing, matter, item; article (of penal code, constitution); (2) smoking pipe; (3) bird [=chim]
[ tra ] : (1) to consult, look up; (2) to fit in; (3) to add; (4) to apply