This happens when you choose a different importing style. The software allows you to import songs in a different way and I believe this way also specifies the way you search in the application. Try adding the files in a different way and then search for name.
Here is a screenshot that you can use as guidance after the Import Songs button is clicked:
![Import options](https://content.screencast.com/users/psichokillah/folders/Jing/media/a0279536-1bb8-486c-879e-6779a9a77d2b/2017-01-20_1718.png)