Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, tran tuan, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
dang cong » dung cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » 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 tuan) or (trung tam)) dang cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((trung tuan) OR (trung tam)) dang cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung tuan) or (trung tam)) dang cong tan toan cau*.