Perhaps you should try some spelling variations:
"series estudios hispanicos." » "series estudios historicos.", "series estudios hispano.", "series estudios islamicos.", "serie estudios hispanicos.", "seis estudios hispanicos.", "tres estudios hispanicos."
"series estudios urbanos." » "serie estudios urbanos.", "seis estudios urbanos.", "tres estudios urbanos.", "series estudios urbano."
"serie estado cubano." » "serie estudio cubano.", "serie estudos cubano.", "serret estado cubano."

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