Perhaps you should try some spelling variations:
presented » presente, presenta, presentan, presenteed, presentaed
presentaron » presentacion, presentation, presentan, presentaon, presentanon, presentarseon, presentearon, presentaaron
presenteare » presentare, presentarse, presentara, presenteeare, presentaeare
presentar » presenta, presentan, presentarse, presentear, presentaar
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 (presenteare OR presentar)) OR present))~.
• Adding a wildcard symbol may retrieve word variants: (presented or ((presentaron or (presenteare or presentar)) or present))*.