I cannot use the type field in the Advanced query syntax indexed Series search.

type:work AND (ost OR soundtrack OR サウンドトラック OR サントラ)

I tried work, works, recording, recordings, release, releases, rg… no results.

Despite the search without type, does return some work, recording, release group, release… series.

ost OR soundtrack OR サウンドトラック OR サントラ