Perhaps you should try some spelling variations:
khanh trach » khanh tra
trach nhiem » trac nghiem
khac trac » khac trai, khach trai, khai thac
trac nghe » trac nghiem, thai nghe, cac nghe
nghe duoc » nghiem duoc, nghe nuoi, che duoc
tu khanh » vu khanh, tu hanh, tu thanh
nhiem va » nghiem va, hiem xa
duoc hoc » quoc hoi
su khac » vu khac, se khac, bui khac
va hoc » van hoc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu khanh trach nhiem va hoc ) or ( su khac trac nghe duoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu khanh trach nhiem va hoc ) OR ( su khac trac nghe duoc hoc ))*.