Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
tran tuan » tran xuan, tran quang, tran thanh
hong bang » dong bang, hang ban, hong hanh
cong ban » cong bang, cong san, cong tan

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 tuan) OR (tran tuan)) nhung ((cong ban) or (hong bang)) nhu cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((trung tuan) OR (tran tuan)) nhung ((cong ban) OR (hong bang)) nhu cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung tuan) OR (tran tuan)) nhung ((cong ban) or (hong bang)) nhu cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung tuan) OR (tran tuan)) nhung ((cong ban) or (hong bang)) nhu cau*.