advanced search with space??

[postinferno]

Has anyone used advanced "label search" recently?
I tried it according to this method: https://support.spotify.com/us/article/search/

I remember the same thing around 2019 was working flexibly, but it appears to be changing.

Following cases are about searching items with the label named

"© 2018 Yerevan Tapes".

With the query contains partial "label:Yerevan",

I got almost got the results I wanted.

(but contains "Yerevan records", "Yerevan music" and more like them. Which I didn't  mean to)

With the query complete "label:Yerevan Tapes" or "label:© 2018 Yerevan Tapes",

they showed an empty result.

I have tried several others and it seems to be due to including space.

I'm considering building a web app with scraping and I want the accurate results as possible.

If searching with the javascript and web api, a query with only a "label:" specification is considered blank request .