Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
kiem soat » kiem toan
tinh quan » tinh quang, trinh quan, tin quan
hien hoat » thien hoat, dien hoat, hieu hoat
van kiem » va kiem, van kien, van hieu
van hien » van hieu, van tien
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 luan van kiem soat ) or ( tinh quan luan van hien hoat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van kiem soat ) OR ( tinh quan luan van hien hoat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van kiem soat ) or ( tinh quan luan van hien hoat ))*.