Perhaps you should try some spelling variations:
dung dang » dung dan, dung dong, dung danh
kiem soat » kiem toan
tinh dung » tin dung, tinh quang, tinh huong
hieu soat » hieu suat, hieu hoat, hieu luat
dang van » hoang van, hang va
van kiem » va kiem, van kien, van hien
van hieu » cao hieu
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: (( trinh dung dang van kiem soat ) or ( tinh dung luan van hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung dang van kiem soat ) OR ( tinh dung luan van hieu soat )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dung dang van kiem soat ) or ( tinh dung luan van hieu soat ))*.