I havn't played it but I think the hand rankings go like this: (not sure, so don't hate!)
A hand can consist of 1, 2, 3, or 4 cards. Any 4 card hand beats any 3 card hand, any 3 card hand beats any 2 card hand, etc.
A hand is determined by throwing away multiple suits or pairs. For example 2s 5d 9h 6s is a 3 card hand because the 6 must be thrown away. 2s 7d 10s 10d is a 2 card hand, a 10 must be taken from the pair, but there is also 2 spades and 2 diamonds so one of each must be taken away, leaving you with a hand of 2s 7d.
From there the best low hand wins.
I am not sure if this is right, but I took a shot at it. Go google it