Perhaps you should try some spelling variations:
estados » estado
presentados » presentadas, presentada, presentando, presentas, presentans, presentars
presentans » presentan, presentons, presentant
presentaron » presentacion, presentation, presentan
presented » presente, presenta, present
presentado » presenta, presentan, presentar

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

• Performing a fuzzy search may retrieve terms with similar spellings: (estados or ((prestadoras or (((presentados OR presentans) or presentaron) or presented)) or presentado))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (estados OR ((prestadoras OR (((presentados OR presentans) OR presentaron) OR presented)) OR presentado)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(estados or ((prestadoras or (((presentados OR presentans) or presentaron) or presented)) or presentado))".
• Adding a wildcard symbol may retrieve word variants: (estados or ((prestadoras or (((presentados OR presentans) or presentaron) or presented)) or presentado))*.