Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung hoc » trung quoc
dung cong » dung trong
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai
trung ha » trung tam, trung cap
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh ((trung ha) OR (trung hoc)) dung cong dan thanh lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung ha) OR (trung hoc)) dung cong dan thanh lap".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung ha) OR (trung hoc)) dung cong dan thanh lap*.