----- Nội dung ảnh ----- 1. There are 54 ethnic groups in Viet Nam. 2. I love mua sap, a popular folk dance of the Thai people. 3. Women play an important role in Jrai family. 4. Stilt houses are popular among different ethnic minority groups in our country. 5. The Bahnar and Ede have communal house (called a Rong house). 6. I attended the Ban Flower Festival in Dien Bien Last year. 7. The stilt houses of the Tay and Nung usually overlook a field. 8. We will watch a documentary about the Khmer tomorrow. 9. Minority groups have their own musical instruments like dan tinh, gong, t'rung.