Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh huong
hieu soat » hieu suat, hieu hoat, hieu luat
quang uan » quang tuan, quang ban, quang tran
dien hoat » dien hoa, dien hat, trien hoat
kiem soat » kiem toan
van hieu » cao hieu
uan van » quan van, tan van, san van
luan » quan, 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 quang uan van ((dien hoat) or (kiem soat)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van hieu soat ) OR ( tinh quang uan van ((dien hoat) OR (kiem soat)) )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van hieu soat ) or ( tinh quang uan van ((dien hoat) or (kiem soat)) ))*.