Most site search engines (being far less sophisticated than Google) will not search on three letter words. They get far to many results so are just ignored.
ABS = ABS, abs, crabs, absolute, etc. etc.
This obviously causes problems searching for something like the acronym ABS, so your best bet is to find associated words - Steve used anitlock in his example, but you could also try "anti" or "brake" or "lock" or "conversion" or "stopping"...
If you can use two associated words it can narrow down the results if needed
And in the case of the OP, here on XF's forum search in the upper right corner, I would enter "brake" in the search box and "Freddy" in to the By field - it brings up all the times Freddy mentions brake
Goggle results are probably still mainly showing links to the old SMF forum so they no longer work. Over time, Google will find the new links in the XF forum and update their search results to point to the new locations.