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

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