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

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