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