Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
hieu soat » hieu suat, hieu hoat, hieu luat
dung quan » dung quang, luong quan, dang quang
quan quan » quan quang, qua quan, quan luan
quan kien » quan dien, quan mien, xuan kien
kien soan » bien soan, kiem toan, kiem soat
van hieu » cao hieu
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 ( tinh dung quan quan kien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van hieu soat ) OR ( tinh dung quan quan kien soan )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van hieu soat ) or ( tinh dung quan quan kien soan ))*.