Perhaps you should try some spelling variations:
quang tran » quang tuan, quang trung, quang thanh
chien hoat » thien hoat, chien thuat, trien hoat
tinh dung » trinh dung, tin dung, tinh huong
dung xban » dung xuan, dung luan, dung nhan
van chien » van hien, van tien
xban van » ban van, luan van, ban va
van hieu » cao hieu
tran van » luan van

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 xban van hieu qua ) or ( tinh quang tran van chien hoat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung xban van hieu qua ) OR ( tinh quang tran van chien hoat ))*.