Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu quang » thieu quang, hieu quan, hieu qua
dung cong » dung trong
anh tang » anh bang, anh dang, anh nang
tang vat » tang van, dang vat, bang vat
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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: ho ((chieu xanh) OR (hieu quang)) - anh tang vat dung cong dan van ban~.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (hieu quang)) - anh tang vat dung cong dan van ban*.