... behavior purchasing fast food in Hanoi, Vietnam H1.1: Frequency of fast food (with demographic variables) H1.2: Money spent fast food per month (with demographic variables, frequency of fast food ... factors relate to marketing- mix factors influence consumers‟ behavior purchasing fast food in Hanoi, Vietnam H2.1: Quality food and quality service relate to Frequency of fast food intake H2.2: ... personality, psychology and marketing- mix factors effect on foreign fast food; find out the influence of marketingmix on utilizing fast food enterprises in Hanoi, Vietnam Method: A descriptive,...