Perhaps you should try some spelling variations:
presented » presente, presenta, presentan, presenteed, presentaed
presentaron » presentacion, presentation, presentan, presentaon, presentanon, presenteon, presentearon, presentaaron
presentaon » presentacon, presentaion, presentan, presenteaon, presentaaon
presentarse » presentase, presentanse, presentese, presentearse, presentaarse
presentar » presenta, presentan, presente, 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 presentaon) OR (presentarse OR presentar)) OR present))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(presented or (((presentaron OR presentaon) or (presentarse or presentar)) or present))~".
• Adding a wildcard symbol may retrieve word variants: (presented or (((presentaron OR presentaon) or (presentarse or presentar)) or present))*.