Give more words in the same group as the words given

Here are more words in the same group as those given:

1. **The Cham** - **The Kinh** - **The Muong** - **The Tay**

2. **What** - **Who** - **Where** - **Why**

3. **Red River Delta** - **Northwest region** - **Southeast region** - **Central Highlands**

4. **Raise cattle** - **Weave cloth** - **Grow rice** - **Make pottery**