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
kiem toan » ke toan, kiem tra
dung tan » dung toan, duong tan, dung tai
van hieu » cao hieu
tan van » tran van, tang van, luan van
uan van » luan van, quan van, san van

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 tan van hieu soat ) or ( tinh quang uan van ((kiem soat) OR (kiem toan)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung tan van hieu soat ) OR ( tinh quang uan van ((kiem soat) OR (kiem toan)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung tan van hieu soat ) or ( tinh quang uan van ((kiem soat) OR (kiem toan)) ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung tan van hieu soat ) or ( tinh quang uan van ((kiem soat) OR (kiem toan)) ))*.