10. The computer-readable storage medium of claim 9 , the instructions further comprising shortening the test phrase by removing the term from the end of the test phrase.
10. The computer-readable storage medium of claim 9 , the instructions further comprising shortening the test phrase by removing the term from the end of the test phrase. 11. The computer-readable storage medium of claim 10 , the instructions further comprising, when there are no more terms to remove in the test phrase: retrieving the normalized phrase, then setting the test phrase equal to the normalized phrase; shortening the test phrase by removing a term at the start of the test phrase; and repeating the comparison step with the shortened test phrase.