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
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau
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 - ((canh tranh) or (thanh tung)) va dung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((canh tranh) OR (thanh tung)) va dung cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((canh tranh) or (thanh tung)) va dung cong dan chan cau*.