Mở ứng dụng Snapchat. Từ điểm bất kỳ trên màn hình, vuốt xuống phía dưới. Nhấn nút ⚙️. Kéo xuống và chọn Support (Hỗ trợ). Nhấn nút My Account & Settings (Tài khoản & Cài đặt). Nhấn nút Account Information (Thông tin tài khoản). Nhấn nút Delete My Account (Xóa tài khoản). Nhấn nút page (Trang). Nhập mật khẩu. Nhấn nút Continue (Tiếp tục).

Given the above summary, write a detailed text in English for it.
This is the yellow app with a ghost icon. Doing so will open your Snapchat account page. It's in the upper-right corner of the screen and takes you to the Settings menu. It's in the "More Information" section. It's the last selection on the screen.  It's in the center of the menu. This launches a new page explaining how to delete your account. If you want a new Snapchat user name but don't want to delete your existing account, you can just create a new account. It's in the third paragraph. Do so to verify that you want to delete your account. If your username doesn't autofill, you'll need to enter that, as well. Your Snapchat account is now deactivated and will be deleted after 30 days.  If you change your mind, you can reactivate your account by signing into Snapchat within 30 days of deactivation. As of February 2017, there is not a way to export your friends list from Snapchat. While many of them will be searchable by phone number from your device's Contacts app, you should screen shot your Friends list before deleting your account.