Perhaps you should try some spelling variations:
hung cuong » hung vuong, hong cuong, hung luong
hieu quan » hieu qua, lieu quan, thien quan
hanh tran » hanh trang, thanh tran, hanh tram
hung cong » nhung cong, phung cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
tran van » luan van
than man » thanh san, tran manh, than phan
than ma » than va, khan ma, nhan ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu quan - hanh tran van ((hung cong) or (hung cuong)) ban ((than man) or (than ma))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu quan - hanh tran van ((hung cong) OR (hung cuong)) ban ((than man) OR (than ma)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu quan - hanh tran van ((hung cong) or (hung cuong)) ban ((than man) or (than ma))*.