Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
truong va » truong dai, truong cao, truong dao
dung cong » dung trong
cong ban » cong bang, cong san, cong tan
than cao » toan cao, than cap, than sao
thai cao » tai cao, thoai cac, thuat cao

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 tam) or (truong va)) dung cong ban ((than cao) OR (thai cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((trung tam) OR (truong va)) dung cong ban ((than cao) OR (thai cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung tam) or (truong va)) dung cong ban ((than cao) OR (thai cao))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung tam) or (truong va)) dung cong ban ((than cao) OR (thai cao))*.