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

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 : pozzi celebri ((di opera) OR (_ opera)) teatrali el casos y pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pozzi celebri ((di opera) OR (_ opera)) teatrali el casos y pianoforte.*.