I used to be able to type in an email address (or some other small bit of text) that I knew existed on a particular site and Google would locate that page in a split second. Unfortunately, this is no longer the case. For some reason, the majority of pages from many sites now have been moved to Google’s “Supplemental Index” (identified in the green font area on the search results page with the words, “Supplemental Result”). From what I’ve experienced, if a page is in the “Supplemental Index” it means it’s no longer being returned for normal searches. Fortunately, Yahoo! search still works for this.