Perhaps you should try some spelling variations:
"experiencias regionales." » "experiencias personales.", "experiencias nacionales.", "experiencias profesionales."
"experiencia regional." » "experiencia relacional.", "experiencia nacional.", "experiencia personal."
"conferencias magistrales." » "conferencias magistral.", "conferencias magistrados."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("experiencias regionales.") OR ("experiencia regional."))) OR ("conferencias magistrales."))~.
• Removing quotes may allow a broader search: (((( experiencias regionales. ) or ( experiencia regional. ))) or ( conferencias magistrales. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("experiencias regionales.") or ("experiencia regional."))) or ("conferencias magistrales."))*.