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• Performing a fuzzy search may retrieve terms with similar spellings: werner von siemens (ring OR ((((ingoeo OR fgingo) OR fggingooo) OR (fgingo OR inge)) OR ing))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "werner von siemens (ring OR ((((ingoeo OR fgingo) OR fggingooo) OR (fgingo OR inge)) OR ing))*".