Perhaps you should try some spelling variations:
"rurales estudios hispano." » "locales estudios hispano.", "morales estudio hispano.", "reales estudio hispano."
"reales estudios hispano." » "reales estudio hispano.", "locales estudios hispano.", "leyes estudios hispano."
"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 ((("reales estudios hispano.") OR ("rurales estudios hispano."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("series estudio urbano.") OR ((("reales estudios hispano.") OR ("rurales estudios hispano.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"series estudio urbano.\") or (((\"reales estudios hispano.\") OR (\"rurales estudios hispano.\"))))".
• Removing quotes may allow a broader search: (( series estudio urbano. ) or ((( reales estudios hispano. ) OR ( rurales estudios hispano. )))).
• Adding a wildcard symbol may retrieve word variants: (("series estudio urbano.") or ((("reales estudios hispano.") OR ("rurales estudios hispano."))))*.