Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang
tinh » trinh, dinh, minh

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 ((may tinh) OR (chieu sach)) - thanh trung cua nhung cong ((dan than) OR (ban than)) ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((may tinh) or (chieu sach)) - thanh trung cua nhung cong ((dan than) or (ban than)) ban*.