2. The delivery system of claim 1 , further comprising a phrase length pre-filtering component for comparing a phrase length of an index entry with a phrase length of the user search query.
2. The delivery system of claim 1 , further comprising a phrase length pre-filtering component for comparing a phrase length of an index entry with a phrase length of the user search query. 4. The delivery system of claim 2 , wherein the phrase length pre-filtering component compares the phrase length of the user search query with a broad match index entry and filters out the broad match index entry if the user search query has fewer characters than the broad match index entry.