Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan ban
can van » cac van, can ban, tan van
van va » van vat, van van, ban va

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