SET @str = 'Felix';
SELECT * FROM (
  SELECT body, 1 AS table_order FROM articles AS a1 WHERE SOUNDEX(a1.body) = SOUNDEX(@str)
  UNION ALL
  SELECT body, 2 AS table_order FROM articles AS a2 WHERE levenshtein(body, @str) BETWEEN 0 AND 5 ORDER BY levenshtein(body, @str)
) AS articles ORDER BY table_order ASC