Perhaps you should try some spelling variations:
obra central » obra teatral, la central, asia central
celebri de » celebri di
central de » centro de, centros de
agentes en » agentes del, patentes en, agentes y
agentes de » agente de, fuentes de, antes de
de obra » de obras
pezzi » pozzi

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 de obra central de ((agentes en) OR (agentes de)) pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri de obra central de ((agentes en) OR (agentes de)) pianoforte.*.