UltraSurf is a program that requires no installation, meaning you may be able to use it on heavily restricted computers. When you open UltraSurf, it connects to the closest available proxy using your computer's default browser and then it opens an incognito (or private) window in that browser. You can then use the browser to visit blocked or restricted sites. Unfortunately, UltraSurf is only available on Windows computers. Go to https://www.techspot.com/downloads/5711-ultrasurf.html in your computer's web browser. If you can't download this program while on a restricted computer, you can download it at home and put it on a flash drive. You'll then be able to run the program from the flash drive. It's a blue button in the upper-left corner of the page. Doing so prompts UltraSurf to begin downloading onto your computer. UltraSurf will download in a ZIP folder. To do so:  Double-click the ZIP folder. Click the Extract tab. Click Extract all  Click Extract Double-click the u1704 icon in the extracted folder. UltraSurf will begin running immediately. If you downloaded UltraSurf onto a flash drive, first plug the flash drive into the restricted computer and open it. UltraSurf will take a few seconds to find and connect to an optimal proxy server that isn't blocked on your network. Once the browser window opens, you can use it to search for restricted content or view blocked sites.

TL;DR in Vietnamese:
Tìm hiểu cách sử dụng UltraSurf. Mở trang UltraSurf bằng cách truy cập https://www.techspot.com/downloads/5711-ultrasurf.html từ trình duyệt web của máy tính. Nhấp vào nút Download Now (Tải ngay) màu xanh dương ở phía trên góc trái trang. Giải nén thư mục UltraSurf ZIP theo cách sau: Mở UltraSurf bằng cách nhấp đúp vào biểu tượng u1704 trong thư mục đã giải nén. Chờ trình duyệt mặc định hiển thị. Duyệt web không giới hạn.