Perhaps you should try some spelling variations:
y pianoforte » e pianoforte, _ pianoforte, de pianoforte
teatrali el » teatrali per, teatral e, teatrales en
di opera » di opere, la opera
_ opera » la opera
caso y » casos y, paso y, caso _
pezzi » pozzi
celebri » celebre, celebra, celebro

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : pezzi celebri ((di opera) OR (_ opera)) teatrali el caso y pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri ((di opera) OR (_ opera)) teatrali el caso y pianoforte.*.