Perhaps you should try some spelling variations:
del pianoforte » de pianoforte, der pianoforte, e pianoforte
opera teatral » opere teatrali, obra teatral
teatral de » teatral e, central de, teatro de
caso del » caso de
de caso » de casos
pezzi » pozzi
celebri » celebre, celebra, celebro

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 di) OR (cerebral y)) opera teatral de caso del pianoforte.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : pezzi ((celebri di) OR (cerebral y)) opera teatral de caso del pianoforte.*".