Sure! Here are the sentences converted into reported speech:

1. Mr. Bruce asked where I was studying.
2. Mai said to call her at 6 o'clock the next morning.
3. Lan asked if I was interested in that Language Center.
4. Mrs. Chi said they would spend their holiday in Da Lat the following month.
5. Liz asked if I lived there.
6. The man asked Mr. Linh what his son wanted to learn.
7. Hoa said I had to come that day.
8. Tom told us that he didn’t understand what we were saying.
9. Nam said that there wasn’t any information about those colleges.
10. My mother told me that she would give me a present.
11. Mary said that she would study in that school the following year.
12. The man asked Mary to give him the book.
13. The boy asked his mum to please give some money.
14. The man told the boys not to stay there.
15. Mary asked Tom if he was a student.
16. My mother asked if I had revised my lesson.
17. She asked why I liked English.

Feel free to ask if you need any further assistance!