It doesn't work for me 100% of the time. I opened a message I found the word 'autodj' in it. Did a search for autodj with timeframe ALL and nothing comes up. Tries several other tests like this and never get any results. This is a pretty prominent website. I'm pretty suprised that a key feature like this would not be fixed right away.
If you have a specific example of "it doesn't work", please tell me, I can't do anything about it without specific feedback. "It doesn't work" can mean "I can't use it", "It crashes when I try it", "I don't find stuff that I'm looking for" or "I can't find the search feature".
Now we are getting somewhere. It appears the "exact phrase" option works okay. It is the "all words" or "any words" option that don't work.
For instance, the first message in your results also has the words 'super tagging' in it.
If you do a search for 'any words' or 'all words' for autodj super tagging. You get no results. Likewise if you do a search for 'any words' or 'all words' with just the word autodj, you don't get any results either. I tested with super tagging thinking you needed to use more than one word for those options to work. No dice.