Most of them can't leave, if they wanted to. They don't have enough money, especially for an entire family. Others like where they live, I suppose, and want to stay there. Perhaps they have a house that was passed down through generations and therefore need to keep for generations to come. There's also plenty of work in the area, I presume, so it'll pay somewhat decently for workers, though probably not enough to take a whole family and leave the country.
India and China have influenced Southeast Asia
The kingdom in southeast Asia before the colonial time mostly influence by India. The kingdom and the King name is like India. The religion of people in Southeast Asia until today got influence from India and China. Even Muslim in Southeast Asia is not coming from Middle East, but from India Christian is spread to Southeast Asia during colonial time.
Southeast Asia, including China, India, Tibet, Nepal, and Japan
Southeast Asia, including China, India, Tibet, Nepal, and Japan
primarily in China and parts of India, some in other southeast Asian countries
India and China.The subcontinentEuropechina
China and IndiaChina, and India (in that order).
China India
Southeast Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia.
Depends what you mean by southeast Asia. If you count China, India, and the island countries like Indonesia and the Philippines, close to around 2/3 of the world's population. China and India account for 47% by themselves.
According to Wikipdia, from Mondal (2007), Tea originated in Southeast Asia, in the countries India, Burma, China and Tibet.
China and India.