Perhaps you should try some spelling variations:
"series estudios urbano." » "seis estudios urbano.", "tres estudios urbano.", "leyes estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "series estudios peruanos."
"serie estudios urbano." » "serie estudios urbanos.", "serie estudio urbano.", "serie estudios peruanos."
"serie studias hispano." » "serie estudios hispano.", "serie studies hispanic.", "serie studia hispano.", "serie guias hispano.", "serie estudio hispano."

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