Perhaps you should try some spelling variations:
"tres estudioss urbano." » "tres estudios urbanos.", "tres estudio urbano.", "tres estudios urbano.", "tres estadios urbano.", "otros estudios urbano."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."
"series espacio urbano." » "series spain urbano.", "versus espacio urbano.", "sociales espacio urbano.", "series espacio urbanismo."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("tres estudioss urbano.") or ((("series estudios urbano.") or ("series espacio urbano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tres estudioss urbano.") OR ((("series estudios urbano.") OR ("series espacio urbano."))))*.
• Removing quotes may allow a broader search: (( tres estudioss urbano. ) or ((( series estudios urbano. ) or ( series espacio urbano. ))))*.