Perhaps you should try some spelling variations:
"rurales estudios hispana." » "locales estudios hispana.", "morales estudio hispana.", "reales estudio hispana.", "rurales estudios hispano.", "rurales estudios hispanicos.", "rurales estudios historia."
"reales estudios hispana." » "reales estudios hispano.", "reales estudios hispanicos.", "reales estudios historia.", "reales estudio hispana.", "locales estudios hispana.", "leyes estudios hispana."
"series estudio urbano." » "series estudios urbano.", "serie estudio urbano.", "serie estudios urbano.", "series estudios urbanos.", "series espacio urbano."

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