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• Performing a fuzzy search may retrieve terms with similar spellings: accademia national delle scienze (stati uniti d'(america OR american))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "accademia national delle scienze (stati uniti d'(america OR american))".
• Adding a wildcard symbol may retrieve word variants: accademia national delle scienze (stati uniti d'(america OR american))*.