Perhaps you should try some spelling variations:
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos.", "series estudio urbanos.", "series estudios peruanoss.", "series estudios hispanos."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudio urbano.", "series estudios peruanos.", "series estudios hispano."
"dos estudios urbanos." » "dos estudio urbanos.", "dos estudios peruanoss.", "dos estudios hispanos.", "los estudios 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: (((("series estudios urbanos.") or ("dos estudios urbanos."))) or ("series estudios urbano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudios urbanos.") OR ("dos estudios urbanos."))) OR ("series estudios urbano.")).
• Removing quotes may allow a broader search: (((( series estudios urbanos. ) or ( dos estudios urbanos. ))) or ( series estudios urbano. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudios urbanos.") or ("dos estudios urbanos."))) or ("series estudios urbano."))*.