Although vanilla is originated from America, it is heavily cultivated in Asia just like how chocolate, and rubber were brought to Asia and the top producer of this commodities are Asian countries.
Anyway, the 2nd pict is definitely Rhy retusa. One reason is the leaves are long and the stem is very short. Aerides tend to have longer stem. Second is the flower is pendulous while Rhy coelestis gives an upright spike.
It's wonderful to see orchid flowering in the wild.