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

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