`1`.It is about 100 kilometers from Ha Noi to Thanh Hoa 

`\rightarrow` Khoảng cách : It is about + distance + from N1 + to N2

`2`.Despite being so young , Quang Hai plays football beautifully

`\rightarrow` Despite / In spite of + V-ing / N + Clause : Mặc dù

`3`.My father used to live in small village when he was a child

`\rightarrow` `'text{S + used to + V :}` Đã từng

`4`.How far is it from Thanh Hoa to Ha Noi ?

`\rightarrow` Hỏi về khoảng cách : How far is it + from N1 + to N2 ?

`5`.I often went to school on foot when I was a student

`\rightarrow` Thì QKĐ : S + Ved / V2

`\rightarrow` Thì QKĐ ( ĐT Tobe ) : S + was / were + adj / n 

`\text{@ TheFox}`

=>
1. It is about 100 kilometers from Ha Noi to Thanh Hoa City.
-> It is (about) + khoảng cách + from...to...
2. Despite being so young, Quang Hai plays football beautifully.
-> depsite N/Ving : mặc dù
3. My father used to live in small village when he was a child.
-> used to V : đã từng
4. How far is it from Thanh Hoa to Ha Noi city?
-> hỏi khoảng cách : how far is it from...to...?
5. I often went to school on foot when I was a student.
-> go to school on foot ~ walk to school (đi bộ đến trường)