Er, type in the little box at the top right and hit enter? The method
hasn't changed, so far as I can tell.
If you mean to say that the help sucks--well....be sure to send your
critique where it will do the most good. At the bottom of each Help
topic, there is a "Did this Help: Yes, No, Somewhat" button. Click one
and enter feedback on that particular topic, whether it didn't answer
your question, or whether it is the first (bad) hit for something not
covered.
General complaints may be submitted via Help | Send Feedback in any
Office app.
In the meantime, these newsgroups will attempt to pick up the slack.
