Perhaps you should try some spelling variations:
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."
"reales estudios urbano." » "reales estudios urbanos.", "reales estudio urbano.", "reales estudios peruanos.", "rurales estudios urbano.", "locales estudios urbano."
"series espacio urbano." » "series spain urbano.", "versus espacio urbano.", "sociales espacio urbano.", "series espacio urbanismo."

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