Hi @nino.b !

We're really sorry to know the tracks you love isn't on Deezer. Not all artists and rights' holders choose to add their music on our platform. We always respect their wishes so some music isn't available or might be temporarily removed. 

see link below
 

or 

You can try a couple of things:

• Add your MP3 collection to Deezer 
• Contact the artist via their social media channels and request for the tracks/albums to be added to Deezer, we take care of the rest