Perhaps you should try some spelling variations:
"conferencia ministerial." » "convergencia ministerial.", "conference ministerial.", "conferencia ministerio."
"conferencias magistrales." » "convergencias magistrales.", "conferences magistrales.", "consecuencias magistrales.", "referencias magistrales.", "diferencias magistrales.", "conferencias magistral.", "conferencias magistrados."
"conferencia monetaria." » "convergencia monetaria.", "conference monetaria."

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: (("conferencia ministerial.") OR ((("conferencias magistrales.") OR ("conferencia monetaria."))))~.
• Removing quotes may allow a broader search: (( conferencia ministerial. ) or ((( conferencias magistrales. ) or ( conferencia monetaria. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("conferencia ministerial.") or ((("conferencias magistrales.") or ("conferencia monetaria."))))*.