Perhaps you should try some spelling variations:
del pianoforte » de pianoforte, der pianoforte, e pianoforte
obra central » obra teatral, asia central
agentes del » agentes de, antes del, agente de
celebri de » celebri di
la central » _ central
de agentes » de fuentes
pezzi » pozzi

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

• Performing a fuzzy search may retrieve terms with similar spellings: Biblioteca lirica : pezzi celebri de ((obra central) OR (la central)) de agentes del pianoforte.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : pezzi celebri de ((obra central) OR (la central)) de agentes del pianoforte.".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri de ((obra central) OR (la central)) de agentes del pianoforte.*.