Perhaps you should try some spelling variations:
gases generales » bases generales, rasgos generales, leyes generales
generales de » general de, general del
celebri de » celebri di
de gases » de clases
casos en » casos de
caso el » caso del, caso en
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 de gases generales de ((caso el) OR (casos en)) pianoforte.~".
• Adding a wildcard symbol may retrieve word variants: Biblioteca lirica : pezzi celebri de gases generales de ((caso el) OR (casos en)) pianoforte.*.