Perhaps you should try some spelling variations:
"series estudios hispano." » "seis estudios hispano.", "tres estudios hispano.", "leyes estudios hispano.", "serie estudios hispano.", "senales estudios hispano.", "teorias estudios hispano."
"serie estudios urbano." » "serie estudios urbanos.", "serie estudios peruanos.", "serie d'estudis urbans."
"series estudio urbano." » "serie estudio urbano.", "senales estudio urbano.", "teorias estudio urbano.", "series estudios urbanos.", "series espacio 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: (("series estudio urbano.") or ((("series estudios hispano.") or ("serie estudios urbano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("series estudio urbano.") OR ((("series estudios hispano.") OR ("serie estudios urbano.")))).
• Removing quotes may allow a broader search: (( series estudio urbano. ) or ((( series estudios hispano. ) or ( serie estudios urbano. )))).
• Adding a wildcard symbol may retrieve word variants: (("series estudio urbano.") or ((("series estudios hispano.") or ("serie estudios urbano."))))*.