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