Perhaps you should try some spelling variations:
"series estudiosss urbano." » "series estudios urbano.", "serie estudios urbano.", "serie estudio urbano.", "series estudios urbanos.", "series estudiossss urbano.", "serie estudiosss urbano.", "serie estudiossss urbano."
"seis estudios urbano." » "seis estudios urbanos.", "seis estudios peruanos.", "seis estudios hispano.", "los estudios urbano.", "dos estudios urbano.", "dios estudios urbano."
"series estudio urbano." » "series estudios urbano.", "serie estudio urbano.", "serie estudios urbano.", "series estudios urbanos.", "series espacio urbano."

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

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