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

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