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Every URL served by your web site is recorded in your web server logs.  You could brute-force your way through it by grepping for whatever the prefix is for your search URLs (for example, `/search?query=`), but if you're using a tool or package to build and run your web site (the question title refers to a CMS), that tool probably has something built in that's better.  Check the documentation for "analytics" or "traffic".  You can also use Google Analytics to see which searches people run, if you don't mind relying on an external provider.

All of this is about the *URLs the server received*.  The end of the question asks about tracking the dynamic pages *created* from those searches, which is a different problem.  An out-of-the-box web server doesn't log the traffic it sends back (which would make for very large logs).  If you need to know what was returned from a specific search at a specific point in time, you'll need to have your search code log that somehow.  How you do that would depend on how exactly you've implemented your search.