Theo mình chắc là như vậy mới đúng.

Phd and Bachelor: Your question is equivalent to asking "What is the difference between a Porsche and a Car?"

All PhDs are doctorates. Not all doctorates are PhDs.

Several professional schools offer doctorates that are not PhDs. These include Medicine (MD), Veterinary Medicine (DVM), Dental Science (DDS or DMD), Law (JD), Education (EdD or DEd), Divinity (DD) and business (DBA).

The PhD is an academic degree rather than a professional degree. It is considered the highest degree possible.

thanks bạn, cho mình hỏi thế muốn gọi ai đó bằng chức danh. ví dụ : tiến sĩ X. Thì viết là Doctor X hay là PhD X vậy