The Rank Results by setting allows you to choose how you want retrieved solutions to appear in the display list. Solutions with the highest ranking appear at the top of the list. The options are rare terms, terms ordered, terms count and hit count. When Terms Count is selected, the number of search terms matched determines the ranking, regardless of frequency. When Rare Terms is selected, the behavior is similar to Terms Ordered except that more emphasis is placed on terms that occur in fewer sources being searched.
Rare Terms ranking is best for an Intuitive match method search.