Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
ban thanh » ban hanh, ban hang
he trong » he thong, he trung, le trong
dan than » dan chan, ban than, van than
tung he » dung he, tung ho, tang he

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 - thanh tung he trong cong ((dan than) or (ban thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh tung he trong cong ((dan than) OR (ban thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tung he trong cong ((dan than) or (ban thanh)) cao*.