Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hang cong » dang cong, hang nong, bang cong
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than
cong va » dong va, cong ha, cong tac
va hang » van hang, va nang, va lang

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)) - thanh cong va hang cong ((van toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh cong va hang cong ((van toan) OR (dan than)) cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - thanh cong va hang cong ((van toan) or (dan than)) cao*.