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

You may be able to get more results by adjusting your search query.

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