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

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