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