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
trung va » trang va, trung ha, trung tam
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
toan cao » toan ban, toan tap

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