Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
lieu tinh » trieu tinh, diep tinh, bien tinh
dung cong » dung trong
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang
tung ap » tang ap, tung dan, tung bay
ap dung » xay dung, van dung

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 sang) OR (lieu tinh)) - thanh tung ap dung cong ((dan than) OR (ban than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (lieu tinh)) - thanh tung ap dung cong ((dan than) OR (ban than)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (lieu tinh)) - thanh tung ap dung cong ((dan than) OR (ban than)) cau*.