Viet Nam has entered into more than 80 investment treaties, including bilateral investment treaties and free trade agreements. In recent years, the country has also faced an increasing number of investor-state disputes, focusing the attention of government action. This paper examines the extent to which Viet Nam has internalised its investment treaty obligations, both before and after its experience with investment treaty claims. The chapter analyses the current investment law and policy landscape of Vietnam, against the backdrop of three decades of government policy addressing foreign investment. The chapter concludes that Vietnam has made significant efforts to internalise the provisions of investment treaties into national governance. It has done so through formal regulation, i.e. mechanisms for legislative screening, and informal coordination and education processes. Still, the paper reveals that the awareness and understanding of investment treaties by local governments remains limited, suggesting the existence of further factors affecting the internalisation process.