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 estudioss hispanic.", "senales estudios hispanic."
"serie desafio urbanismo." » "serie espacio urbanismo."
"series estudio urbano." » "serie estudio urbano.", "serie estudios urbano.", "senales estudio urbano.", "series estudios urbano.", "series estudios urbanos.", "series espacio urbano."

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