Mở Facebook. Vào trang cá nhân của một người bạn. Chọn Friends (Bạn bè). Chọn thanh tìm kiếm. Nhập tên của người cần tìm. Tìm tên của người đó.

Given the above summary, write a detailed text in English for it.
Either tap the Facebook app icon that resembles a white "f" on a blue background (mobile), or go to https://www.facebook.com/ (desktop). This will open your News Feed if you're already logged into Facebook. If you aren't logged in, enter your email address and password before continuing. This must be a friend who is currently also friends with the person whom you think blocked you. To go to a friend's page:  Select the Search bar. Enter your friend's name. Select their name in the drop-down box. Select their profile image. It's below the grid of photos near the top of their profile (mobile) or directly below their cover photo (desktop). Tap or click the "Search Friends" bar at the top of the screen (mobile) or in the upper-right side of the Friends page (desktop). Type in the name of the person whom you think blocked you. After a moment, the friends list should refresh with results. If you see the person's name and profile picture in the results, they haven't blocked you. If you don't see the name and picture here, the person has either blocked you or deleted their account. One way to find out is by asking the friend whose page you're on to verify the account's existence.