Comment by johncoltrane

    :h 'option'
    :h :command
    :h i_ctrl-w
    :h ctrl-w
    :h v:
    :help auto<Tab>
    :help <C-d>
    :helpgrep foo | cw

    <C-]> on an highlighted word to jump to its doc
    <C-t> to jump back

The vim documentation is the best place to go for Vim help and it's on your computer.

Its size is a direct consequence of its completeness and its "unsearchability" is a direct consequence of the ignorance and possible unwillingness to learn of those who can't find their way.