Perhaps you should try some spelling variations:
tin luong » tien luong, tin huong, tin tuong
hieu suat » hieu luat, hieu qua
tinh hong » tinh huong, tinh khong, tinh phong
hong quan » thong quan, tong quan, uong quan
quan hanh » quan thanh, quang thanh, quang khanh
hanh bien » hanh kien, thanh vien, thanh nien
bien soan » bien so
quan van » luan van, quan luan, quan doan
quan va » quan vi, quan ha, luan va

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

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