Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
canh tinh » hanh tinh, manh tinh, canh tranh
tinh quan » tinh quang, trinh quan, tin quan
quan hanh » quan thanh, quang thanh, quang khanh
hanh cong » thanh cong, hang cong, hanh dong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 sach) or (chieu sang)) - canh tinh quan hanh cong ((dan toan) OR (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - canh tinh quan hanh cong ((dan toan) OR (dan than)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - canh tinh quan hanh cong ((dan toan) OR (dan than)) ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - canh tinh quan hanh cong ((dan toan) OR (dan than)) ban*.