Terminalia corticosa Pierre ex Laness., Pl. Util. Col. Franç. 315 1886. (Syn: Terminalia mucronata Craib et Hutch.; Terminalia thorelii
Distribution : Cambodia, Vietnam (South), Thailand ( Northern) and Laos (Attapeu, Champassack, Khammouane and Savannakhet provinces).
Terminalia thorelii, I presume
It could be Terminalia microcarpa F.J. Muell one of the tree in INDEX SEMINUM of Botanical Garden, Lalbagh
I saw Terminalia microcarpa in Lalbagh with a name board.
This one was without name board.
Also the barks are different, as well as the leaves