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