Search My Music by file name to a list?

iTunes 12.3.2.x

I used to be able to do this in iTunes really easily but can't find a way to do this anymore.

Here's an example - I have lots of scratch recordings of various guitars, and one of them is a Carvin DC125. So recordings made with that guitar I would make sure that "DC125" was in the file name. When I search in "My Music" for "DC125" I can still find a list of files, but that list shows up only under the search box until I select one of the files then the list disappears.

itunes USED to let me enter "DC125" as a search, then it just displayed those files in a list and I could jump around in that list at will without having to perform the search again.

There is no other useful metadata to filter this with, as the artist is saved "unknown" and there are thousands of files with that info. I've tried making playlists as well, but for what its worth the old search function was way better and more fluid for this type of thing.