Perhaps you should try some spelling variations:
presentado » presentan, presented, presentacion, presentedo
presentaron » presentacion, presentation, presentan, presentanon, presentarseon, presenteon, presenteron
presentane » presentan, presentare, presentant, presentene
presentene » presentenme, presenten, presentent
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: (presentado OR ((presentaron OR ((presentane OR presentene) OR presentar)) OR presenta))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(presentado or ((presentaron or ((presentane OR presentene) or presentar)) or presenta))~".
• Adding a wildcard symbol may retrieve word variants: (presentado or ((presentaron or ((presentane OR presentene) or presentar)) or presenta))*.