Perhaps you should try some spelling variations:
theo chiet » theo chieu, thep thiet
chiet tach » chieu sach
dua nhung » cua nhung, du nhung, qua nhung
anh nang » ganh nang, anh bang, anh dang
nang dua » nang du, nang suat, nang quan
cong tac » cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chiet tach - anh nang dua nhung ((cong san) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chiet tach - anh nang dua nhung ((cong san) OR (cong tac)) toan ban*.