Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
anh sang » lanh sang, anh bang, anh dang
anh dong » anh huong, anh son
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((anh sang) or (anh dong)) va dung cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((anh sang) OR (anh dong)) va dung cong dan than ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((anh sang) or (anh dong)) va dung cong dan than ban*.