----- Nội dung ảnh ----- 1. How many ethnic groups are there in Vietnam? 2. Where do the Kinh people mostly live? 3. What is the population of the Tay? 4. Which ethnic groups have the smallest population? 5. What do most ethnic peoples mainly live on? 6. Do the ethnic minority groups have the same culture, religion and belief? 7. How is the culture of each ethnic group?