Perhaps you should try some spelling variations:
"senales estudios hispano." » "senales estudio hispano.", "reales estudios hispano.", "series estudios hispano."
"sociales estudios hispana." » "sociales estudios hispanicos.", "sociales estudios historia."
"series estudio urbano." » "series estudios urbano.", "serie estudio urbano.", "serie estudios 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 ((("senales estudios hispano.") or ("sociales estudios hispana."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("series estudio urbano.") OR ((("senales estudios hispano.") OR ("sociales estudios hispana.")))).
• Removing quotes may allow a broader search: (( series estudio urbano. ) or ((( senales estudios hispano. ) or ( sociales estudios hispana. )))).
• Adding a wildcard symbol may retrieve word variants: (("series estudio urbano.") or ((("senales estudios hispano.") or ("sociales estudios hispana."))))*.