Apparently Google had nothing to do with this. http://www.newsday.com/business/ny-bzgoog1206,0,2339508.story?coll=ny-business-headlines Also, I checked other search engines and 'miserable failure' yields the same results, albeit a few notches lower.
normally the search words are marked if you look in the cached version of the site found, this time it says: These terms only appear in links pointing to this page: miserable failure My guess is that some jokers made many pages containing "miserable failure" with a link to the Bush site, google is probably not involved, just it's search engine is fooled, again.