Why are the advanced search terms available in the normal search function not available in your personal playlists? I'm not sure about the desktop or web-application but it doesn't work on Android.

I'm referring to these advanced search terms.

I don't want to create new playlists for certain combinations of artists. If I have a large playlist with all of my favourite music under the rock category. Now let's say i'd like to play both Radiohead and Coldplay, I must create a new playlist instead of just searching "Coldplay OR Radiohead", maybe I want to listen to both Eddie Vedder's solo work and Pearl Jam, I would need to create seperate playlist for all these simple requests.

It doesn't seem like a lot of trouble to implement this since the functionality already exists in the normal search option.