How to match some text preceded by any other text

How can I match "Because it already exists" with regex in string below :

<faultstring>Error has occured! Reason why: Because it already exists. request id: 443p3-34356a</faultstring>

This expressio fails :

(.+)+Because it already exists(.+)+ 

I need to match <faultstring></faultstring> as well, so I need to match Because it already exists inside faulstring opening and closing tags

note:

T开发者_如何学Pythonhis is a multiline string, I just printed out this one it is important.

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I don't think you want those outer pluses.

(.+)Because it already exists(.+)

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More simply :

/Because it already exists/

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Using this online regular expression tester, I found that Borealid reply totally fulfills your need.

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This will do what you ask:

(?<=.+)Because it already exists(?=.+)

However it looks like you are doing something unusual and there is probably a better way to do it.

What are you trying to do?