To search for posts by a certain subject or user, go to a forum page and click on the "Search Messages" link. Once you are in the Search Page, enter in any specific keywords you are looking for and set the timeframe in which you would like to search. You may also search by a specific username to narrow your search results as well. When you have finished entering your search parameters, click on the "Find" button once. You will either be brought to a page displaying all of your results or you will get a message stating that there were no records relating to your search.