Perhaps you should try some spelling variations:
quan thanh » ban thanh
tinh dung » trinh dung, tin dung, tinh quang
hieu suat » hieu luat, hieu qua
dinh hong » dinh huong, dinh hung, dinh thuong
van thanh » ban thanh, van tuan
vien soat » kiem soat, bien soan, vien sau
van hieu » cao hieu
luan » lan

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

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