Hi there @Petr_Hladky,
thanks for posting about this !
We want all the world’s music and podcasts on Spotify, but availability can vary over time and between countries, depending on the permissions from rights holders.
We add new content to Spotify every day, so if you can’t find something you’re looking for right now, it may appear (or reappear) soon.
However, you can always use the "Local Files" feature and upload your own legal content to the Spotify app.
In order to learn how to do so correctly, please make sure to follow the steps provided on this help page.
Furthermore, feel free to this request page as well.
Hope this helps.
Let me know if you have any further questions 🙂