Perhaps you should try some spelling variations:
presentan » presente, presentacion, presenten, presentean
presenta » presente, presentea
presentaban » presenteban, presentaron, presentada, presentadas, presenteaban
presentea » presentera, presente, presented, presenteea
presentear » presenterar, presenter, presentedr, presentar, presente, presenteear
presentes » presente, presented, presents, presentees
present » presente

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((presentan or (presenta OR presentea)) or ((presentes or (presentaban or presentear)) or present))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((presentan OR (presenta OR presentea)) OR ((presentes OR (presentaban OR presentear)) OR present))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((presentan or (presenta OR presentea)) or ((presentes or (presentaban or presentear)) or present))*".