The DEMO version only includes 4 pages:
http://sanghanetwork.org
http://sanghanetwork.org/index_option-com_recommend-Itemid-70.html
http://sanghanetwork.org/index_option-com_docman-task-doc_download-gid-16-Itemid-74.html
http://sanghanetwork.org/index_option-com_content-task-view-id-146-Itemid-45.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.
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