Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
thinh doan » chinh doanh, hinh toan, thi doan
thanh cau » thanh chau, thanh mau, nhanh cau
cong van » cong vang, cong san, cong tan
song van » hoang van, trong van, duong van

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: ho ((chieu sach) OR (chieu tinh)) - thinh doan va nhung ((cong van) OR (song van)) thanh cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu tinh)) - thinh doan va nhung ((cong van) OR (song van)) thanh cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu tinh)) - thinh doan va nhung ((cong van) OR (song van)) thanh cau*.