Chuyển màn hình iPad sang hướng ngang. Mở Safari. Nhấn và giữ trên nút quản lý tab. Nhấn vào Open Split View (Mở Split View).

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?
Safari's "Split View" will only work when your iPad's screen is held horizontally. It's a white app with a blue compass icon. It's an icon of two overlapping squares in the upper-right corner of the screen. This opens a drop-down menu. It's the first selection on the menu. Now you can view two Safari tabs at the same time.  Alternatively, drag an open browser tab from the top of the Safari window to the right side of the screen. Doing so will launch "Split View" and open the tab in its own pane.