Most users, most of the time, will want to search just the "articles" - the contents of the pages, So enter your search term in the top box, tick the "Articles" box then click the "Search" button.
For example - where can I find stuff about Meetings ? do this:
Type "meetings" into the search box at the top. ( Don't type the quotes, and note that the search is case insensitive, )
Click the "Articles" box in the Search Only frame
Cloick "All words" in the Search for frame.
Click the Search button
You should get at least 8 hits.
Click on the words after the ordinal number of each list item and you'll get taken to the page where the search term was found.