Perhaps you should try some spelling variations:
sierra central » tierra central
de pianoforte » e pianoforte, per pianoforte
celebri de » celebri di
de puentes » de fuentes
de agentes » de fuentes
de sierra » de tierra, de tierras, de guerra
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 sierra central ((de puentes) OR (de agentes)) de pianoforte.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : pezzi celebri de sierra central ((de puentes) OR (de agentes)) de pianoforte.".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri de sierra central ((de puentes) OR (de agentes)) de pianoforte.*.