Perhaps you should try some spelling variations:
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudio urbano.", "series estudios peruanos.", "series estudios hispano."
"los estudios urbanos." » "los estudio urbanos.", "los estudios peruanoss.", "los estudios hispanos."
"seis estudio urbanos." » "seis estudio urbano.", "seis estudios peruanos.", "seis estudios urbanos.", "eees estudio urbanos.", "seire estudios urbanos."

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