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