1. It is about 60 kilometers from Ha Nam to Ha Noi.

It's + (about) + khoảng cách + from sth to sth 

2. My mum used to live in a village when she was a girl.

used + to V: đã từng 

3. In spite of being so young, he performs excellently.

In spite of + N/ Np / Ving, clause: mặc dù 

4. Let's go to the movie tonight.

Let's + V1: đưa ra ý kiến, đề nghị 

5. Mai went to school on foot when she was in primary school.

walk: đi bộ = on foot 

S + V2/ed: bị động 

`color{orange}{~MiaMB~}`