Perhaps you should try some spelling variations:
vuong quan » luong quan, cuong quan, luong quang
dinh vuong » dinh duong, dinh huong, dinh cuong
tinh dung » tin dung, tinh quang, tinh huong
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
quan va » quan vi, quan ha, luan va
va kiem » van kien
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) OR (trinh dung)) luan van hieu soat ) or ( dinh vuong quan va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((tinh dung) OR (trinh dung)) luan van hieu soat ) OR ( dinh vuong quan va kiem soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((tinh dung) OR (trinh dung)) luan van hieu soat ) or ( dinh vuong quan va kiem soat ))".
• Adding a wildcard symbol may retrieve word variants: (( ((tinh dung) OR (trinh dung)) luan van hieu soat ) or ( dinh vuong quan va kiem soat ))*.