Collectible Card Game Headquarters

Can somebody please point me out where i can find all of forge's advanced search syntax?
I've searched through the forum for it but i can't find anything.
For example, i was trying to make a deck using Jegantha, the Wellspring as a companion, and i was wondering if i could fiddle with the search engine to find cards that do NOT have the same mama symbols in their costs.

To find advanced search syntax for Forge, you can check the official documentation or the manual provided by the developer. Usually, such information can be found on the Forge website.

Have you manage to figure it out since then using Advanced Search ?