Mega Market is a Thai corporation that penetrated the Vietnamese market in the field of fast-moving consumer goods. Mega Market has successfully and quickly opened its business branches mainly in two major cities of Vietnam, Hanoi and Ho Chi Minh City. With the business strategy on commercial premises with a large area and wholesale based business strategy, with the size of investment capital and advantages of management capacity, few domestic enterprises can match and compete with MegaMarket in the same way. This article will provide useful assessment results for large foreign corporations to consider whether to penetrate the Vietnamese market in this way and it entails potential opportunities and risks.