Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
trong toan » truong toan, trong tan, trong hoan
hoc chieu » hoc thieu, ho chieu, hoc hien
ban cong » bang cong, van cong, phan cong
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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

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