Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
manh quang » minh quang, anh quang, nhanh quang
hieu luat » hieu qua
manh quan » manh tuan, anh quan, minh quang
tien soan » bien soan, tien hoang, thien toan
van tien » toan tien, van hieu, van tuan
quan va » quan vi, quan ha, luan va
va hieu » van hieu, va dieu, va hien
tinh » trinh, dinh, minh

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 quan va hieu luat ) or ( ((manh quan) or (manh quang)) luan van tien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang quan va hieu luat ) OR ( ((manh quan) OR (manh quang)) luan van tien soan )).
• Adding a wildcard symbol may retrieve word variants: (( tinh quang quan va hieu luat ) or ( ((manh quan) or (manh quang)) luan van tien soan ))*.