The five-card hand is ranked similar towards five-card draw poker game - but the two-card hand is ranked as pairs or whichever card is higher.
House edge in this particular game is very low so with best strategy and bankroll management, your chance of beating the house is very massive. https://taigamepc.com/giai-tri/game-bai-rikvip-trai-nghiem-va-cam-nhan-cua-mot-game-thu-lau-nam/29