Mở tài liệu Microsoft Word. Nhấp vào Review (Xem trước) Thẻ này nằm đầu cửa sổ Microsoft Word. Nhấp vào Protect Document. Nhập mật khẩu. Nhấp vào OK ở cuối cửa sổ bật ra. Nhập lại mật khẩu, sau đó nhấp OK.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Double-click the Word document that you want to protect with a password. The document will open in Microsoft Word. If you haven't yet created the document, open Microsoft Word and create your document before continuing. This tab is at the top of the Microsoft Word window. Clicking Review prompts a toolbar to appear below the row of tabs at the top of the window. It's a lock-shaped icon on the far-right side of the toolbar. A pop-up window will appear. Type a password into the "Password" field at