Perhaps you should try some spelling variations:
tinh luong » tinh huong, dinh luong, minh luong
trien hoat » tien hoa
luong quan » thong quan, duong qua
van trien » van tien, va trien, van tren
hieu soat » hieu suat, hieu hoat, hieu luat
dung tan » dung toan, duong tan, dung tai
quan van » luan van, quan va, quan luan
van hieu » cao hieu
tan van » tran van, tang van, luan van

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 tan van trien hoat ) or ( tinh luong quan van hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung tan van trien hoat ) OR ( tinh luong quan van hieu soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung tan van trien hoat ) or ( tinh luong quan van hieu soat ))*.