The two Southeast Asian countries mentioned in the crossword solutions are Laos and Thailand. Laos is a landlocked country located in the heart of the Indochinese peninsula, bordered by Myanmar, China, Vietnam, Cambodia, and Thailand. It is known for its mountainous terrain and French colonial architecture. Thailand is a country located in Southeast Asia, bordered by Myanmar, Laos, Cambodia, and Malaysia. It is known for its tropical beaches, ancient ruins, and ornate temples.