The search bar doesn't work, and I've stopped trying that a long time ago. But I found that if you press "Activity" on the bar at the top of the page, then press "Search" from there, it works like magic! Surprisingly.
That's pretty annoying indeed. I usually do a one-word search (those don't crash) and then a multi-word search on the page that comes up but that's pretty complicated. Or a site search on Google but that doesn't seem to find all content...