Perhaps you should try some spelling variations:
presentado » presentan, presented, presentar, presenteado, presentedo
presentada » presentan, presented, presentar, presenteada, presenteda
presentaron » presentation, presentan, presentarse, presentearon, presenteron
presentacion » presenteacion, presentecion
present » presente
presenta » presentea, presente

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: (presentado OR (((presentacion OR presentada) OR presentaron) OR (present OR presenta)))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(presentado or (((presentacion or presentada) or presentaron) or (present OR presenta)))~".
• Adding a wildcard symbol may retrieve word variants: (presentado or (((presentacion or presentada) or presentaron) or (present OR presenta)))*.