Blocking Spam Emails by subject name in Exchange Server 2013

Hello Guys,

I need to know how to block spams by subject from Exchange Server 2013's spam/message filter.
In general, I'm using Exchange's spam filter agents and configured spam blocking by domain name.. but I need to filter unnecessary emails by subject name also.

So, if you know how to resolve this issue, please post here the real solution..

Thanks a lot,