Perhaps you should try some spelling variations:
dinh thuong » dinh huong, dinh duong, dinh cuong
thuong luan » thuong lan, thong luan, truong luan
hien suat » hieu suat, hien luat, hieu luat
bien soan » bien so
van bien » van tien, van hien, vat bien
quan va » quan vi, luan va, quan ve
quan ha » quan he

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( dinh thuong ((quan va) OR (quan ha)) hien suat ) or ( dinh thuong luan van bien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( dinh thuong ((quan va) OR (quan ha)) hien suat ) OR ( dinh thuong luan van bien soan ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( dinh thuong ((quan va) OR (quan ha)) hien suat ) or ( dinh thuong luan van bien soan ))*".