Perhaps you should try some spelling variations:
"series estudios hispanic." » "series estudios hispanicos.", "series estudios hispano.", "series studies hispanic.", "seis estudios hispanic.", "tres estudios hispanic.", "leyes estudios hispanic."
"serie estudio urbano." » "serie estudios urbano.", "serie espacio urbano.", "serie studia urbano.", "serie estado urbano.", "serie estudos urbano."
"serie estudios urbanos." » "serie studias urbanos.", "serie estados urbanos.", "serie estudoss urbanos."

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