Searching for local files on the iPhone

[elmaduro]

I have successfully transferred the local files from the computer to the spotify and now im downloading in the phone.

But i am having a serious problem because I have 1.3k songs and about 98% of them, when i try to put a word inside the file name. 

For example: I put blackbear

and nothing appears although i have about 10 songs in the local files playlist.

Putting things like track:blackbear didnt work either

Is there a way to fix this searching problem??