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
nhan va » nhan tai, nhan dan, nhan tao
than ma » than man, than va, khan ma
han va » hang va, hanh va, 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 - hanh ((han va) OR (nhan va)) nhung ((cong dan) or (cong san)) than ma~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((han va) OR (nhan va)) nhung ((cong dan) OR (cong san)) than ma.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((han va) OR (nhan va)) nhung ((cong dan) or (cong san)) than ma".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((han va) OR (nhan va)) nhung ((cong dan) or (cong san)) than ma*.