If you're looking for information on a specific HVACR topic, manufacturer (or whatever) you can use the site's Search function. The search tab is located in the center of the blue bar at the top of the page.
To limit your search to just the EF, click on Search and in the drop down box click on Advanced Search.
Then type in some good keywords describing the info you want.
Next, go to the big box in the lower RH corner, scroll down to and click on Educational Forums. (Make sure the box for Also search in child forums is checked.)
Click on Search Now at the bottom and you're on your way!
You'll also note that when you open any of the pages found in your search that all of your keywords will be highlighted in red.