Really glad you asked this question. As long as I've been here, the Search function has been, well not great. :(
Let me illustrate with an example, currently there is a topic on the Main board with a thread title: "new Bernina 830". At the moment it is on the first page.
Try doing a Search for Bernina 830 and that thread does not even come up in the results. Maybe the Search function misses the thread titles?
With the wealth of information that has been given on here over time, if the Search function was a better one, then the board would be incredibly more valuable.
:) :)