I did an exact search for a long tail keyword and results were 3600. Then I did broad search and the result was Not enough data . I did search in a couple other keyword tools I have and they both came back with 0 results for searches. Went back and double checked exact search - same 3600 result. Did regular google search and there were plenty of adwords, so I know the term gets searched, since so many were bidding for the term. Can anyone explain why broad search is less then exact? Or why other two tools came back with zero searches?