Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien soan » thien toan, thien van, bien soan
dung quan » dung quang, luong quan, dang quang
quan doan » quan hoang, chuan doan, chan doan
hieu suat » hieu luat, hieu qua
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: (( tin dung quan doan ((thien soan) or (thien thanh)) ) or ( tin dung luan van hieu suat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung quan doan ((thien soan) OR (thien thanh)) ) OR ( tin dung luan van hieu suat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung quan doan ((thien soan) or (thien thanh)) ) or ( tin dung luan van hieu suat ))*.