Perhaps you should try some spelling variations:
quang tran » quang tuan, quang trung, quang thanh
tinh dung » trinh dung, tin dung, tinh huong
hieu suat » hieu luat, hieu qua
tien soat » trien hoat, thien hoat, kiem soat
tran van » luan van
van tien » toan tien, van hieu, van tuan
luan ve » luat ve, luan va, quan ve
ve hieu » ve khieu, va hieu, vo hieu

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 ve hieu suat ) or ( tinh quang tran van tien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan ve hieu suat ) OR ( tinh quang tran van tien soat ))*.