Perhaps you should try some spelling variations:
perez naturales » leyes naturales, parques naturales, parque naturales
pezzi celebre » pezzi celebri
re pianoforte » e pianoforte, de pianoforte, per pianoforte
celebre y » celebre el, celeste y
el centro » del centro, el control, el cuento
un centro » un cuento, un encuentro
y perez » c perez, d perez, p perez

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 celebre y perez naturales ((el centro) OR (un centro)) re pianoforte.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : pezzi celebre y perez naturales ((el centro) OR (un centro)) re pianoforte.".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebre y perez naturales ((el centro) OR (un centro)) re pianoforte.*.