Is it possible to search a view of views? I have a View that is a list of users. One of the fields is an Include View field. 

This field includes another View which has a contextual filter for the user, and shows the node that was created in a certain month by that user (if it exists).

These nodes have categories and I would like to have a filter on the main view where I can sort out which users have a node in a certain category. But due to the nature of included Views, I can't find a filter that works.

Is there a way to search a view that is an Include View?
Under Advanced (located on the right side), for Relationships add Content Authored



Then in Filter (located on the left side) add Content Type and expose the filter.