Perhaps you should try some spelling variations:
"serie estudios peruanos." » "serie estudios urbanos.", "serie estudios americanos.", "serie estudios ensayos."
"series estudios urbano." » "seis estudios urbano.", "tres estudios urbano.", "leyes estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios hispano."
"serie studias urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie studia urbano.", "serie guias urbano."

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

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