Perhaps you should try some spelling variations:
"serie estudios peruanos." » "serie estudios urbanos.", "serie estudios americanos.", "serie estudios ensayos."
"serie desafio urbanismo." » "serie espacio urbanismo."
"series estudios hispano." » "seis estudios hispano.", "tres estudios hispano.", "leyes estudios hispano.", "series estudios hispana.", "series estudios hispanic."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("serie estudios peruanos.") or ("serie desafio urbanismo."))) or ("series estudios hispano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie estudios peruanos.") OR ("serie desafio urbanismo."))) OR ("series estudios hispano.")).
• Removing quotes may allow a broader search: (((( serie estudios peruanos. ) or ( serie desafio urbanismo. ))) or ( series estudios hispano. )).
• Adding a wildcard symbol may retrieve word variants: (((("serie estudios peruanos.") or ("serie desafio urbanismo."))) or ("series estudios hispano."))*.