Perhaps you should try some spelling variations:
quang tan » quang tuan, quang tran, quang toan
kiem soat » kiem toan
tinh dung » tin dung, tinh huong, anh dung
hieu soan » hieu toan, hieu suat, hieu van
van kiem » va kiem, van kien, van hien
van hieu » cao hieu
tan van » tran van, tang van, dang van
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 tan van kiem soat ) or ( ((tinh dung) OR (trinh dung)) luan van hieu soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang tan van kiem soat ) OR ( ((tinh dung) OR (trinh dung)) luan van hieu soan )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh quang tan van kiem soat ) or ( ((tinh dung) OR (trinh dung)) luan van hieu soan ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh quang tan van kiem soat ) or ( ((tinh dung) OR (trinh dung)) luan van hieu soan ))*.