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