Perhaps you should try some spelling variations:
del pianoforte » de pianoforte, der pianoforte, e pianoforte
obra central » obra teatral, la central, asia central
central del » central de, central el, centrales del
del caso » el caso, de caso, del campo
caso del » caso de
de obra » de obras

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