Perhaps you should try some spelling variations:
presentado » presentan, presented, presentar, presentedo
presentaron » presentation, presentan, presentarse, presenteron
presenteron » presentaran, presenter, presentacon
presenten » presente, presentan, presented
presentacion » presentecion
presenta » 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 (presentaron OR presenteron)) OR ((presenten OR presentacion) OR presenta))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((presentado or (presentaron OR presenteron)) or ((presenten or presentacion) or presenta))~".
• Adding a wildcard symbol may retrieve word variants: ((presentado or (presentaron OR presenteron)) or ((presenten or presentacion) or presenta))*.