Perhaps you should try some spelling variations:
dinh quang » minh quang, dinh duong, dinh huong
quang quan » quang tuan, quang uan, quan quan
hieu soat » hieu suat, hieu hoat, hieu luat
minh quan » minh quang, minh tuan, manh quan
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, kinh

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