Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong san » cong tac
san chat » van chat, san chay, ban chat
chat cao » chat co, chat cho, chat bao
ha tinh » va tinh, may tinh
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((ha tinh) or (chieu sach)) - canh tranh ((va hang) OR (va lang)) cong san chat cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((ha tinh) OR (chieu sach)) - canh tranh ((va hang) OR (va lang)) cong san chat cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((ha tinh) or (chieu sach)) - canh tranh ((va hang) OR (va lang)) cong san chat cao*".