Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
trung cua » truong cua, trung tuan, trung cap
trong tan » trong quan, trong ca, cong tan
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dang, cua dong, qua dung
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh trung cua dung ((trong tan) or (trong cac)) tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trung cua dung ((trong tan) OR (trong cac)) tran cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trung cua dung ((trong tan) or (trong cac)) tran cau*.