Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chieu sang)) - hanh tang va nhung ((cong tan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh tang va nhung ((cong tan) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - hanh tang va nhung ((cong tan) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - hanh tang va nhung ((cong tan) or (cong san)) toan ban*.