I use Microsoft IE and when I use the search feature at http://www.pizzamaking.com/forum/index.php?action=search
and want to return to the list of hits after viewing a particular post, I hit the Back button. That usually provokes a webpage expired message. I then hit the refresh button and then click on Retry. The same sequence applies when using the pull-down search box at the top right of a page (any page). That search function is very useful because the search can be limited, if desired, for example, to a given topic/thread or board.
BTW, the abovementioned pull-down search menu has a Custom Google search option for those who wish to use it.