Perhaps you should try some spelling variations:
en pianoforte » e pianoforte, per pianoforte, del pianoforte
obra central » obra teatral, la central, asia central
central de » centro de, centros de
de agentes » de fuentes
agentes en » agentes del, patentes en, agentes de
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) OR (pezzi celebri)) di obra central de agentes en pianoforte.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : ((pozzi celebri) OR (pezzi celebri)) di obra central de agentes en pianoforte.".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : ((pozzi celebri) OR (pezzi celebri)) di obra central de agentes en pianoforte.*.