Perhaps you should try some spelling variations:
"series estudios urbano." » "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos.", "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano."
"serie studias urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie estudios urbano.", "serie guias urbano.", "serie estudioss urbano."
"serie studia urbano." » "serie estudio urbano.", "serie estudios urbanos.", "serie estudios 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 studias urbano.") OR ("serie studia urbano."))) OR ("series estudios urbano."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"serie studias urbano.\") OR (\"serie studia urbano.\"))) or (\"series estudios urbano.\"))~".
• Removing quotes may allow a broader search: (((( serie studias urbano. ) OR ( serie studia urbano. ))) or ( series estudios urbano. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("serie studias urbano.") OR ("serie studia urbano."))) or ("series estudios urbano."))*.