Perhaps you should try some spelling variations:
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos."
"series espacio urbano." » "series spain urbano.", "versus espacio urbano.", "sociales espacio urbano.", "series espacio urbanismo."
"serie estado cubano." » "serie estudio cubano.", "serie estudos cubano.", "serret estado cubano.", "serie estado cubana.", "serie estado cuban."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("series espacio urbano.") or ("series estudios urbanos."))) or ("serie estado cubano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series espacio urbano.") OR ("series estudios urbanos."))) OR ("serie estado cubano.")).
• Removing quotes may allow a broader search: (((( series espacio urbano. ) or ( series estudios urbanos. ))) or ( serie estado cubano. )).
• Adding a wildcard symbol may retrieve word variants: (((("series espacio urbano.") or ("series estudios urbanos."))) or ("serie estado cubano."))*.