Từ điển Hán Nôm

Four great compilations of Northern Song dynasty, namely: Extensive records of the Taiping era (978) 太平廣記|太平广记, Imperial readings of the Taiping era 太平御覽|太平御览, Prime tortoise of the record bureau 冊府元龜|册府元龟, Finest blossoms in the garden of literature 文苑英華|文苑英华