Perhaps you should try some spelling variations:
chua bang » chu bang, chua xang, thuat bang
chua nang » chuc nang, chua xang, kha nang
cua sinh » hoa sinh, va sinh
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
doi cua » dai cua, hoi cua, dong cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi cua sinh - canh tranh ((chua bang) or (chua nang)) cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi cua sinh - canh tranh ((chua bang) OR (chua nang)) cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: doi cua sinh - canh tranh ((chua bang) or (chua nang)) cong san toan ban*.