Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
nhung cong » dung cong, thong cong, hang cong
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan

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 (chieu sach)) - canh tranh va nhung cong tan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - canh tranh va nhung cong tan phan tu.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - canh tranh va nhung cong tan phan tu*.