I see. Yeah there were other cases where bi/tri grams were producing some pretty off results. For instance searching for "martin" scored less that a body of text that had "martinez" 2 times.
Also people will be using this to look for phone numbers, and as such, splitting them into grams on the search term resulted in useless results as well.
Search term: 949531531 => [949 495 953 .... 531]
So people having phone numbers matching those grams would show up. Ultimately what I'm saying is the entire search term needs to be taken into consideration, not broken up. Order and size of the search term matter a lot in this case.