Perhaps you should try some spelling variations:
presented » presente, present, presentan
presentando » presentado, presentan, presentada, presentendo
presentaron » presentacion, presentation, presentan, presentanon, presentarseon, presenteon, presenteron
presenten » presente, presentan, presentes
presentar » presentan, presentarse, presente, presenter
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: ((presented OR presentando) OR ((presentaron OR (presenten OR presentar)) OR presenta))~.
• Adding a wildcard symbol may retrieve word variants: ((presented or presentando) or ((presentaron or (presenten or presentar)) or presenta))*.