Perhaps you should try some spelling variations:
dinh cuong » dinh huong
dung quan » dung quang, dung luan, luong quan
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
quan van » quan va, quan luan, quan doan
van hieu » cao hieu
van kiem » va kiem, van kien, van hien

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