Perhaps you should try some spelling variations:
pozzi celebri » pezzi celebri
en pianoforte » per pianoforte, del pianoforte, der pianoforte
obra central » obra teatral, la central, asia central
central de » centro de, centros de
de agentes » de fuentes
di obra » de obra, de obras, de sobra

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 : pozzi celebri di obra central de agentes ((en pianoforte) OR (e pianoforte)).~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : pozzi celebri di obra central de agentes ((en pianoforte) OR (e pianoforte)).*".