Isn't there supposed to be a search bar in the Runewords portion of the docs? I remember using one and it being very useful.
The little box on the left side of the screen also doesn't work. Clicking the item type simply leads to the top of the page.
Firefox 70.0.1 (64-bit) used
Both features have been broken this season. Don't think it's a priority to fix. In the mean time use crtl-f