Perhaps you should try some spelling variations:
del documental » el documental, del documento, el documentol
documental de » documental del, documentos de, documento de
de pianoforte » e pianoforte, per pianoforte
teatrali del » teatral de, teatrali per, teatralidad del
c perez » p perez, de perez
d perez » de perez, p perez, del perez
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 ((c perez) OR (d perez)) teatrali del documental de pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri ((c perez) OR (d perez)) teatrali del documental de pianoforte.*.