Perhaps you should try some spelling variations:
pezzi celebre » pezzi celebri
de documentos » y documentos
de pianoforte » e pianoforte, per pianoforte
teatral de » teatral e, central de, teatro de
di opera » di opere, _ opera
la opera » la oferta, la espera, la obra

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 celebre ((di opera) OR (la opera)) teatral de documentos de pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebre ((di opera) OR (la opera)) teatral de documentos de pianoforte.*.