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