What are the immigrant countries in Southeast Asia?

Southeast Asia is a new regional name that only appeared in the late World War II. There are 1 1 countries in Southeast Asia: Vietnam, Laos, Cambodia, Thailand, Myanmar, Malaysia, Singapore, Indonesia, Brunei, Philippines and East Timor. Countries all over the world are used to calling Vietnam, Laos, Cambodia, Thailand and Myanmar "land countries" or "peninsula countries" in Southeast Asia. Malaysia, Singapore, Indonesia, Brunei, the Philippines and East Timor are called "maritime countries" or "island countries" in Southeast Asia. From 65438 to 0967, a "group of countries" appeared in Southeast Asia, namely the Association of Southeast Asian Nations (ASEAN). Up to now, there are 10 member countries.