The DEMO version only includes 4 pages:
http://lienkhucnhac.net
http://lienkhucnhac.net/lien-khuc-nhac-tre.html
http://lienkhucnhac.net/lk-nhac-sen.html
http://lienkhucnhac.net/lk-nhac-khong-loi.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page