Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh huong
kien soat » bien soan, kien hoa, dien hoat
kiem soat » kiem toan
van kien » van tien, van hien, van chien
dang van » hoang van, hang va
san van » tan van, tran van, phan van
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 kien soat ) OR ( tinh quang ((san van) OR (dang van)) kiem soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung luan van kien soat ) or ( tinh quang ((san van) OR (dang van)) kiem soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van kien soat ) or ( tinh quang ((san van) OR (dang van)) kiem soat ))*.