Perhaps you should try some spelling variations:
quang luan » quan luan, quang tuan, quang uan
luan khuan » luan hoan, luan phan, luan khoa
hieu soat » hieu suat, hieu hoat, hieu luat
van hieu » cao hieu
khuan ke » khoan ke, khuan ky, khuan kiem
ke tran » ke trang, ke toan, ke trong
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 luan van hieu soat ) or ( tin dung luan khuan ke tran ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang luan van hieu soat ) OR ( tin dung luan khuan ke tran ))*.