I have found the advanced search to be erratic enough to have sent feedback (via the link) asking if it was "actually working"! Prior to November I was a non-subscriber & used it infrequently, but it seemed to work better in the past to me. I subscribed around the middle of November so I don't have any real 'benchmark', but lately I'm getting reasonable (not great though) results by very carefully selecting or NOT selecting 'exact' in the appropriate fields. It does seem, however, that selecting TOO many field items makes the results more erratic/inaccurate. Minor comfort knowing that it's not just me that has issues with it!