Perhaps you should try some spelling variations:
"entornos visuales oecc." » "entornos digitales oecc.", "estudios visuales oecc.", "entornos locales oecc.", "entornos visuales en.", "entornos visuales de.", "entornos visuales del."
"actores locales oecc." » "actores sociales oecc.", "actores locales en.", "actores locales de.", "actores locales e."
"entornos virtuales oecc." » "entornos virtuales de.", "entornos virtuales en.", "entornos virtuales tic."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("entornos visuales oecc.") or ("actores locales oecc."))) or ("entornos virtuales oecc."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("entornos visuales oecc.") OR ("actores locales oecc."))) OR ("entornos virtuales oecc.")).
• Removing quotes may allow a broader search: (((( entornos visuales oecc. ) or ( actores locales oecc. ))) or ( entornos virtuales oecc. )).
• Adding a wildcard symbol may retrieve word variants: (((("entornos visuales oecc.") or ("actores locales oecc."))) or ("entornos virtuales oecc."))*.