Perhaps you should try some spelling variations:
"serie estudios urbano." » "serie estudio urbano.", "serie estudios peruanos.", "serie d'estudis urbans."
"serie estudios urbanos." » "serie estudio urbanos.", "serie estudios peruanoss.", "serie d'estudis urbanss."
"series estudios hispano." » "seis estudios hispano.", "tres estudios hispano.", "leyes estudios hispano.", "series estudios hispana.", "series estudios hispanic."

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