> I cannot do
> C-h i m eintr <Ret>
> 
> Rather, one has to do the following, with spaces etc.
> C-h i m emacs Lisp Intro <Ret>
> 
> Would be grateful if info could access the intro with
> C-h i m eintr <Ret>

`m' matches your input against the title of the manual

`m int RET' does what you want.