On July 5, 2025, the Vietnam National University of Forestry (VNUF) held a university-level doctoral dissertation defense for PhD candidate Khamphet Phomphoumy in the field of Forest Inventory and Planning, code: 9620208. His dissertation, titled “Study on Structure and Tree Species Diversity of Tropical Forest in Phou Khao Khouay National Park, Lao People's Democratic Republic”, was conducted under the scientific supervision of Assoc. Prof. Dr. Nguyen Hong Hai and Dr. Cao Thi Thu Hien.