Perhaps you should try some spelling variations:
perez teatrali » opere teatrali
per pianoforte » e pianoforte, de pianoforte
pezzi celebro » pezzi celebri
celebro d » cerebro de, celebri di, cerebro y
el casos » el caos, en casos, de casos
d perez » de perez, c perez, p perez

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 celebro d perez teatrali ((el casos) OR (el caso)) per pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebro d perez teatrali ((el casos) OR (el caso)) per pianoforte.*.