I have found that upper right search box to be non-functioning.
In addition to what crosbyman said, you can click on the white SEARCH rectangle in the upper far right, then scroll down about 1/3 of the way, then under the box that says “SEARCH FORUMS” enter your word and hit “GO!”
Even if you do a Google search with the search word preceded by “aomci” you’ll get some good results. Ex: aomci coils
https://www.google.com/search?q=aomci+coils&rlz=1C1GCEA_enUS918US918&oq=aomci+coils&aqs=chrome..69i57j69i60l2.3173j0j15&sourceid=chrome&ie=UTF-8
