To solve the urgent problems of Vietnamese social history in the 14th - 15th centuries, which is the requirement to consolidate and build a unified and strong Dai Viet nation, with a centralized autocratic state apparatus; on the basis of absorbing and inheriting the premises of political and social thought in the cultural tradition of the Vietnamese people as well as the political thought of Confucianism and Legalism, the thought of Le Thanh Tong was formed and developed. In the rich and unique political ideology of Le Thanh Tong, the outstanding and meaningful issue is the idea of combining moral governance and legal governance, which he expressed in great works such as: National Dynasty Penal Code, Chau Co Thang Thuong Thi Tap, Chinh Tay Ky Hanh, Van Minh Co Suy,...