A report by Ministry of Public Works on July 13th, 1837 (the 18th King Minh Mang year) showed that having returned from Hoang Sa, the province had to give instructions to Vo Van Hung, Pham Van Sanh and Luu Duc Truc, and so on, apart from fleet led by Pham Van Bien.

The wood-block under Nguyen Dynasty, recorded in the book, “Dai Nam thuc luc chinh bien de nhi ky”, volume 165 in the 17th Minh Mang year (1836), recorded that the Ministry of Public Works reported to the court on the very important Hoang Sa under our maritime boundary

A four-page intact order by the Dang family on Ly Son Island (Quang Ngai), 36cm long, 24cm wide, clearly noted that on April 15th in 1834 (the 15th King Minh Mang year), Quang Ngai Provincial mandarin dispatched a fleet of three ships to guard Hoang Sa island.

One of the two reports of Da Nang’s leader on June 27th in 1830 (the 11th King Minh Mang year), sent to the court with a content that a trade ship from France had been rescued after having crashed into a shoal in west Hoang Sa (Cat Vang area).

The Directive by a General under the Tay Son Dynasty, issued on Feburary 14, 1786, gave order that Hoang Sa Fleet sailed four trawlers to Hoang Sa archipelago and other islands to collect gold, silver, copper, tortoise-shells for customs

The document found at My Loi Village, Phu Loc District, Thua Thien-Hue Province, with a content to settle a lawsuit between My Toan Ward (present My Loi Village, Vinh My Commune) and An Bang Ward (Vinh An Commune) about a dispute over a hull of Hoang Sa Fleet adrifting ashore the beach bordering these two wards. According to this document, in 1760, under King Le Hien Tong (1740-1786), there was Hoang Sa Fleet in charge of managing and exploiting products in Hoang Sa archipelago. The orginal Han script document was written on “do” (rhamnoneuron) paper

The edict No. 10 of King Bao Dai on February 29 of the year of Bao Dai the 13th (March 30, 1938) ordered that the Hoang Sa archipelago be separated from Nam Ngai province and merged with Thua Thien province.

The Decree No. 4702-CP on December 21, 1933 of Nam Ky (Southern part) Governor Krautheimer on merging the Truong Sa, An Bang, Itu Aba archipelagoes