I wasn’t so sure at first and was just wondering why I got so many hits for things that didn’t belong there, but now I’m pretty sure it’s a bug (5.3 preview 0214, but noticed in previous versions as well).
Searching for Channel, among correct ones, gives all these results on top:
Among results for Compute
And because I ran out of ideas, this happens when searching for “internet” :)
For intern, at first nothing
I can somehow see similarities between Intersect and Internet, how is the string comparison done in the Help Browser search? Seems a bit off.