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