Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung vat » trung van, trong vat, truong van
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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 - thanh ((trung vat) or (trung va)) dung cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung vat) OR (trung va)) dung cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung vat) or (trung va)) dung cong dan than cao*.