Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nong cong » cong cong, tong cong, nang cong
hanh ban » thanh ban, hang ban, hanh san
cua nong » cua cong, cuu nong, cua dong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
ban cua » ban quan

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

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