Perhaps you should try some spelling variations:
quang quang » quan quang, dang quang, dung quang
dinh quang » tinh quang, minh quang, dinh duong
quang toan » quang tuan, quang tran, quang doan
tinh dung » trinh dung, tin dung, tinh quang
hieu luat » hieu qua
tien soat » trien hoat, thien hoat, kiem soat
van hieu » cao 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 dung luan van hieu luat ) or ( dinh quang quang toan tien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van hieu luat ) OR ( dinh quang quang toan tien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van hieu luat ) or ( dinh quang quang toan tien soat ))*.