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