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