Perhaps you should try some spelling variations:
"series estudios urbanos." » "seis estudios urbanos.", "tres estudios urbanos.", "leyes estudios urbanos.", "series estudio urbanos.", "series estudios peruanoss.", "series estudios hispanos."
"serie estudios urbanos." » "serie estudio urbanos.", "serie estudios peruanoss.", "serie estudios hispanos."
"dios estudios urbano." » "dios estudio urbano.", "dios estudios peruanos.", "dios estudios hispano.", "dos estudios urbano.", "los estudios urbano.", "otros estudios urbano."

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