Perhaps you should try some spelling variations:
"series estudios hispanic." » "series estudios hispanicos.", "series estudios hispano.", "series studies hispanic.", "serie estudios hispanic.", "seis estudios hispanic.", "tres estudios hispanic."
"serie desafio urbanismo." » "serie espacio urbanismo."
"series espacio urbano." » "series spain urbano.", "versus espacio urbano.", "sociales espacio urbano.", "series espacio urbanismo."

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