Perhaps you should try some spelling variations:
luong quan » thong quan, duong qua
minh luong » dinh luong, minh tuong, minh cuong
tinh dung » trinh dung, tin dung, tinh quang
hieu suat » hieu luat, hieu qua
bien soan » bien so
quan van » quan va, quan luan, quan doan
van bien » van tien, van hien, vat bien
lan van » lang van, tan van, san van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh dung ((lan van) OR (luan van)) hieu suat ) or ( minh luong quan van bien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung ((lan van) OR (luan van)) hieu suat ) OR ( minh luong quan van bien soan )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung ((lan van) OR (luan van)) hieu suat ) or ( minh luong quan van bien soan ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung ((lan van) OR (luan van)) hieu suat ) or ( minh luong quan van bien soan ))*.