Perhaps you should try some spelling variations:
dung quan » dung quang, dung luan, luong quan
trinh ung » trinh dung, trinh duong, trinh nhung
hieu soat » hieu suat, hieu hoat, hieu luat
quan van » luan van, quan va, quan luan
van bien » van tien, van hien, vat bien
dung van » duong van, dung va, dang van
van hieu » cao hieu
tin » tinh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung quan van bien doi ) or ( trinh ung dung van hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung quan van bien doi ) OR ( trinh ung dung van hieu soat ))*.