Perhaps you should try some spelling variations:
"series estudioss urbano." » "serie estudios urbano.", "seis estudios urbano.", "serie estudos urbano.", "series estudios urbano.", "series estudios urbanos.", "serie estudioss urbano.", "seis estudioss urbano.", "tres estudioss urbano."
"series estudios hispana." » "series estudios hispano.", "series estudios hispanicos.", "series estudios historia.", "serie estudios hispana.", "seis estudios hispana.", "tres estudios hispana."
"serie estudio urbano." » "serie estudios urbano.", "serie estudios urbanos.", "serie espacio urbano.", "serie studia urbano.", "serie estado 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 estudioss urbano.") OR ("serie estudio urbano."))) OR ("series estudios hispana."))~.
• Removing quotes may allow a broader search: (((( series estudioss urbano. ) or ( serie estudio urbano. ))) or ( series estudios hispana. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("series estudioss urbano.") or ("serie estudio urbano."))) or ("series estudios hispana."))*.