Major search flaw?

I can't seem to find a way to make the search function search on all keywords. For example, I entered exponential moving average in the keywords field & it returned any post that has exponential or moving or average in the title.
I also tried "exponential moving average" , exponential & moving & average and several other variations. It always returns posts that have ANY of the keywords ... I just want posts that have ALL the keywords. Is there any way to do this? A lot of forums give you the option to search on any/all keywords, but I dont see that option here. Thanks...