Perhaps you should try some spelling variations:
"serie studias hispano." » "serie estudios hispano.", "serie studies hispanic.", "serie studia hispano.", "series estudios hispano.", "serie guias hispano."
"serie estudio urbano." » "serie estudios urbano.", "serie espacio urbano.", "series estudios urbano.", "serie studia urbano.", "serie estado urbano."
"serie estudios urbanos." » "series estudioss urbanos.", "serie studias urbanos.", "serie estados 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 ("serie studias hispano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie estudio urbano.") OR ((("serie estudios urbanos.") OR ("serie studias hispano.")))).
• Removing quotes may allow a broader search: (( serie estudio urbano. ) or ((( serie estudios urbanos. ) or ( serie studias hispano. )))).
• Adding a wildcard symbol may retrieve word variants: (("serie estudio urbano.") or ((("serie estudios urbanos.") or ("serie studias hispano."))))*.