Perhaps you should try some spelling variations:
"entornos digitales el." » "entorno digital el.", "entornos virtuales el.", "entornos digitales en.", "entornos digitales de.", "entornos digital el."
"entornos digitales y." » "entorno digital y.", "entornos virtuales y.", "entornos digitales en.", "entornos digitales de."
"informes digitales el." » "informes digitales en.", "informes digitales de.", "informes digital el."

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