When you bring up the search page at the bottom there is a check box that lets you search all of the site or focus just on a specific section
The check all is below the bar with - Choose a board to search in, or search all -
Check the "+" to the left of Choose a board to search in, or search all -
Then check the sections you want to limit the search to if you want to focus on one or a limited number of sections
Typically I start with a wide search then focus down if need by by focusing on a poster, adding words or limiting sections. Focusing down to specific sections may work if they are posted in a different section but we tend to move things around to keep things tidy here so more likely to be in the right section than some of the other sites - plus we have more sections and sub sections
Good luck
