Perhaps you should try some spelling variations:
presented » presente, presenta, presentan, presenteed, presentaed
presentaron » presentacion, presentan, presentar, presentearon, presentaaron
presentation » presentacion, presentan, presentado, presenteation, presentaation
presentear » presentar, presenter, presente, presenteear, presentaear
presentarse » presentearse, presentaarse
present » presente, presenta

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 (((presentaron OR presentation) OR (presentarse OR presentear)) OR present))~.
• Adding a wildcard symbol may retrieve word variants: (presented or (((presentaron or presentation) or (presentarse or presentear)) or present))*.