How to track PHP variables as different pages?

I just encountered that Piwik tracks all my site pages as being the same. They have the structure index.php?cat=blog&language=de&big=asdg3a&title=blablabla

How can you set up Piwik to track these variations of index.php? Tracking the title tag is the most important.

set a Here

and it will appear in page title report