You can use your computer's built-in screenshot function to take a screenshot on Windows or take a screenshot on Mac by going to the Chrome page in question and then pressing your computer's proper key combination. If you want to use a Chrome extension to take your screenshot, proceed with the rest of this method. Click or double-click the Chrome app icon, which resembles a red, yellow, green, and blue ball. This extension is free to install, and will take a screenshot of your entire page (not just the window's contents) in Google Chrome. This blue button is in the upper-right corner of the page. Doing so installs the Full Page Screen Shot extension in your Chrome browser. Open the website, service, or item of which you want to take a screenshot. It's a camera-shaped icon in the upper-right corner of the Chrome window. Clicking it prompts Chrome to begin screenshotting your page. If you ever can't find the "Full Page Screen Capture" icon, click ⋮ and look for it at the top of the resulting drop-down menu. Depending on how long the page is, this can take anywhere from a second to a minute or two. Once the image opens in a new tab, you can proceed. Click the PDF download button in the upper-right corner of the page to download the image as a PDF file, or click the downward facing arrow to the right of the PDF icon to download the image as a PNG file.  If prompted to allow Full Page Screen Shot access to your downloads, click Allow on the prompt. You may be asked to specify a download location before your screenshot will download.

TL;DR in Vietnamese:
Xem xét việc sử dụng tính năng chụp ảnh màn hình của máy tính. Mở Google Chrome. Mở trang Full Page Screen Shot. Nhấp vào Add to Chrome (Thêm vào Chrome). Nhấp vào Add extension (Thêm tiện ích mở rộng) khi được nhắc. Đi đến trang mà bạn muốn chụp ảnh. Nhấp vào biểu tượng "Full Page Screen Capture". Chờ Chrome chụp ảnh màn hình xong. Tải ảnh.