Perhaps you should try some spelling variations:
obra teatrales » obras teatrales, obra teatral
en pianoforte » e pianoforte, per pianoforte, del pianoforte
tell agentes » de agentes, del agente, el agente
celebri de » celebri di
agentes en » agentes del, patentes en, agentes de
de obra » de obras

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 OR pozzi) celebri de obra teatrales tell agentes en pianoforte.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Biblioteca lirica : (pezzi OR pozzi) celebri de obra teatrales tell agentes en pianoforte.*".