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