Perhaps you should try some spelling variations:
chieu tach » chiet tach, chieu sach, chiu trach
doi chieu » doc hieu, doi chi, mot chieu
anh quang » anh xquang, anh quan, nhanh quang
tran hung » tran hong, tran quang, tran hoang
trong tan » trong quan, trong cac, trong ca
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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: doi chieu tach - ((anh quang) OR (thanh san)) tran hung ((trong tan) OR (cong tan)) toan ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu tach - ((anh quang) or (thanh san)) tran hung ((trong tan) or (cong tan)) toan ban*.