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