Perhaps you should try some spelling variations:
tinh luong » tinh huong, dinh luong, minh luong
luong quan » thong quan, duong qua
chien soat » thien hoat
tinh dung » trinh dung, tinh quang, tinh huong
hieu suat » hieu luat, hieu qua
van chien » van hien, van tien
van hieu » cao hieu
quan van » quan va, quan luan, quan doan
luan » lan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((tinh dung) OR (tin dung)) luan van hieu suat ) OR ( tinh luong quan van chien soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((tinh dung) OR (tin dung)) luan van hieu suat ) or ( tinh luong quan van chien soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( ((tinh dung) OR (tin dung)) luan van hieu suat ) or ( tinh luong quan van chien soat ))*.