Perhaps you should try some spelling variations:
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos."
"serie estudio urbanos." » "serie estudio urbano.", "serie estudios urbano.", "serie estudios peruanos.", "serie estudios urbanos.", "serie studia urbanos.", "serie estado urbanos."
"serie studias urbano." » "serie estudios urbano.", "serie estudio urbano.", "serie studia urbano.", "serie guias 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 studias urbano.") or ((("serie estudio urbanos.") OR ("series estudios urbanos."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie studias urbano.") OR ((("serie estudio urbanos.") OR ("series estudios urbanos."))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"serie studias urbano.\") or (((\"serie estudio urbanos.\") OR (\"series estudios urbanos.\"))))*".
• Removing quotes may allow a broader search: (( serie studias urbano. ) or ((( serie estudio urbanos. ) OR ( series estudios urbanos. ))))*.