Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
phong cong » phong chong, thong cong, chong cong
tranh va » tranh van, trang va, trinh va
va phong » van phong, va phuong, va thong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (chinh sach)) - canh tranh va phong cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chinh sach)) - canh tranh va phong cong dan than cao*.