Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong vang » cong lang, cong quang, cong ngang
tranh va » tranh van, trang va, trinh va
cong van » cong san, song van, cong tan
chat cao » chat co, chat cho, chat bao
va hang » van hang, va nang, va lang
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: ho ((cuu tinh) OR (chieu sach)) - canh tranh va hang ((cong van) OR (cong vang)) chat cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((cuu tinh) or (chieu sach)) - canh tranh va hang ((cong van) OR (cong vang)) chat cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((cuu tinh) or (chieu sach)) - canh tranh va hang ((cong van) OR (cong vang)) chat cao*.