Perhaps you should try some spelling variations:
"series estudioss urbano." » "series estudios urbano.", "serie estudios urbano.", "seis estudios urbano.", "series estudios urbanos.", "series estudiosss urbano.", "serie estudioss urbano.", "serie estudiosss urbano."
"series estudio urbano." » "series estudios urbano.", "serie estudio urbano.", "serie estudios urbano.", "series estudios urbanos.", "series espacio urbano."
"tres estudios hispano." » "otros estudios hispano.", "los estudios hispano.", "dos estudios hispano.", "tres estudios hispana.", "tres estudios hispanic."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudioss urbano.") OR ("series estudio urbano."))) OR ("tres estudios hispano."))~.
• Removing quotes may allow a broader search: (((( series estudioss urbano. ) or ( series estudio urbano. ))) or ( tres estudios hispano. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("series estudioss urbano.") or ("series estudio urbano."))) or ("tres estudios hispano."))*.