By my second +1 I didn't mean to suggest that CHM manuals are missing--rather that I miss them.
And because of the rapid (more or less live) evolution of the online docs, I tend to agree with the thinking that it is best not to have CHM manuals for now, assuming they would be compiled relatively infrequently. ("I searched the manual and it's definitely not there". Not always helpful to search a slightly stale snapshot.)
Maybe CHM can come back later, but for now it might be more useful if the search function for the online help could be made more usable.
It is easy enough to use syntax like
in a search engine.
(That doesn't help with offline reading, though other things do, with effort.)