Perhaps you should try some spelling variations:
"serie studias urbano." » "serie estudios urbano.", "serie studia urbano.", "series estudios urbano.", "serie guias urbano."
"serie estudio urbano." » "serie estudios urbano.", "serie espacio urbano.", "series estudios urbano.", "serie studia urbano.", "serie estado urbano."
"serie estudios urbanos." » "series estudioss urbanos.", "serie studias urbanos.", "serie estados urbanos."

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 urbano.") OR ("serie estudios urbanos."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie studias urbano.") OR ((("serie estudio urbano.") OR ("serie estudios urbanos.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"serie studias urbano.\") or (((\"serie estudio urbano.\") OR (\"serie estudios urbanos.\"))))".
• Removing quotes may allow a broader search: (( serie studias urbano. ) or ((( serie estudio urbano. ) OR ( serie estudios urbanos. )))).
• Adding a wildcard symbol may retrieve word variants: (("serie studias urbano.") or ((("serie estudio urbano.") OR ("serie estudios urbanos."))))*.