By using the search box in the header of every page, you can find the content on AVForums (messages, members and editorial) which matches the keyword(s) you enter.
To find your threads and your posts, click the 'Useful Searches' button in the search drop-down.
If you want to search for your threads in specific forums, then click the search box and then the More... button to activate the Search page. Then follow the instructions below.