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