Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
hieu soat » hieu suat, hieu hoat, hieu luat
nang quan » ban quan, nang suat
bien soan » bien so
van hieu » cao hieu
tin nang » tin dung, ki nang, thi nang
quan doi » quan tri, quan li
doi bien » doi dien, voi bien, doi hien
luan » lan

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 luan van hieu soat ) or ( tin nang quan doi bien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van hieu soat ) OR ( tin nang quan doi bien soan )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van hieu soat ) or ( tin nang quan doi bien soan ))*.