Perhaps you should try some spelling variations:
"serie estudioss urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie estudios urbano.", "serie estudos urbano."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."
"dos estudios urbano." » "dos estudios urbanos.", "dos estudio urbano.", "dos estudios peruanos.", "los estudios 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 estudioss urbano.") or ((("series estudios urbano.") or ("dos estudios urbano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie estudioss urbano.") OR ((("series estudios urbano.") OR ("dos estudios urbano.")))).
• Removing quotes may allow a broader search: (( serie estudioss urbano. ) or ((( series estudios urbano. ) or ( dos estudios urbano. )))).
• Adding a wildcard symbol may retrieve word variants: (("serie estudioss urbano.") or ((("series estudios urbano.") or ("dos estudios urbano."))))*.