You used to get a page of results when searching the forums. Now it seems you only get the dynamically generated list of results.
So if you look at one possible result and then go back, you have to do the search all over again to look at the other results.
Am I missing something?
Did you try pressing enter/return after inputting your search? That should take you to a search page for your query instead of just the live dynamic search that pops up when you click the magnifying glass icon. That page should play nice with the back button on your browser and return you back to your search results.