Flush poker* is one of the powerful and favorite-set hands of poker players in Vietnam. However, to enhance your winning probability at flush poker, you need to master flush poker playing strategy. When applying flush poker playing strategy, you should determine when to bet or call based on the probability to make a flush. Observing only the facial expressions of your opponent to predict the threatens or weakling of their hand to maximizes flush poker playing strategy. In addition, playing with poker psychology to call and avoid overbetting results in predicting your opponent’s move three steps head in the future hand. Thus, applying the proper flush poker playing strategy will help enhance your winning probability when gambling online casinos or participating in poker competitions in Vietnam.