Perhaps you should try some spelling variations:
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos.", "series estudio urbanos.", "series estudios peruanoss.", "series estudios hispanos."
"series estudios urbano." » "serie estudios urbano.", "seis estudios urbano.", "tres estudios urbano.", "series estudio urbano.", "series estudios peruanos.", "series estudios hispano."
"seire estudios urbano." » "seire estudio urbano.", "seire estudios peruanos.", "seire estudios hispano.", "serie estudios urbano.", "seis estudios urbano.", "sobre estudios urbano."

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 estudios urbanos.") OR ("seire estudios urbano."))) OR ("series estudios urbano."))~.
• Removing quotes may allow a broader search: (((( series estudios urbanos. ) or ( seire estudios urbano. ))) or ( series estudios urbano. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("series estudios urbanos.") or ("seire estudios urbano."))) or ("series estudios urbano."))*.