If it's like current models. most USB Keyboards work. Samsung has not made a list for a few reasons. First it would be too long and not possible to keep up to date. Also if they did list a few, it would be taken as a show of favoritism.
My thought is maybe opening it up to non-maker keyboards was a good idea but shows the downside as well. Consumers sometimes don't want choice. In this case a "Samsung" product would be best.