Perhaps you should try some spelling variations:
quang tran » quang tuan, quang trung, quang thanh
kiem soat » kiem toan
tinh dung » trinh dung, tin dung, tinh huong
hieu soan » hieu toan, hieu van, bien soan
hieu suat » hieu luat, hieu qua
van kiem » va kiem, van kien, van hieu
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 quang tran van kiem soat ) or ( tinh dung luan van ((hieu soan) or (hieu suat)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang tran van kiem soat ) OR ( tinh dung luan van ((hieu soan) OR (hieu suat)) )).
• Adding a wildcard symbol may retrieve word variants: (( tinh quang tran van kiem soat ) or ( tinh dung luan van ((hieu soan) or (hieu suat)) ))*.