Perhaps you should try some spelling variations:
per pianoforte » e pianoforte, de pianoforte
obra central » obra teatral, asia central
la central » _ central
cantor per » cantor de
el cantor » el canto, el cantar, el pintor
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 _ ((obra central) OR (la central)) el cantor per pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri _ ((obra central) OR (la central)) el cantor per pianoforte.*.