Perhaps you should try some spelling variations:
"reales estudios urbanos." » "reales estudio urbanos.", "rurales estudios urbanos.", "locales estudios urbanos."
"series estudio urbano." » "series estudios urbano.", "serie estudio urbano.", "serie estudios urbano."
"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: (("reales estudios urbanos.") or ((("series estudio urbano.") OR ("series espacio urbano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("reales estudios urbanos.") OR ((("series estudio urbano.") OR ("series espacio urbano."))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"reales estudios urbanos.\") or (((\"series estudio urbano.\") OR (\"series espacio urbano.\"))))*".
• Removing quotes may allow a broader search: (( reales estudios urbanos. ) or ((( series estudio urbano. ) OR ( series espacio urbano. ))))*.