I realize the obvious fix for the Audible problem is to interpret double quotes as "only search for this phrase," but I wonder if an alternative solution would be do TFIDF for combinations of wordsm, not just individual words. For example, the search crawler could watch for the phrase "the book", "the book of", "the book of why", "book of", "book of why", and "of why", and weight the search results accordingly.
Yes, that would be a better user experience as:
1. not everyone will think to use quotes
2. it would probably be more resilient to minor user errors too (eg if it had been misused misheard as The Book of Way you'd still have a fair chance of it returning the desired result fairly high in the list)
