Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
kiem soat » kiem toan
van kiem » va kiem, van kien, van hieu
dung lam » dung tai, dung dat, dung ha
van bien » van hien, vat bien, van kien
van tien » toan tien, van hieu, van tuan
luan » quan, lan

You may be able to get more results by adjusting your search query.

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