EX8:
1. to/in order to/ so as to (Dùng cái nào cũng được)
2. so that
3. so that
4. to/in order to/ so as to
5. so that
6. to/in order to/ so as to
7. so that
8. not to/in order not to/ so as not to
9. not to/in order not to/ so as not to
10. so that