Perhaps you should try some spelling variations:
en pianoforte » e pianoforte, per pianoforte, del pianoforte
teatral de » teatral e, central de, teatro de
di opera » la opera, _ opera
de caso » de casos
caso en » casos en, caso del
pezzi » pozzi
celebri » celebre, celebra, celebro

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 ((di opera) OR (di opere)) teatral de caso en pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri ((di opera) OR (di opere)) teatral de caso en pianoforte.*.