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