It used to be the largest tracker of Vietnam in the past and totally free. Since it charge a fee for download from 2012 the number of members has decreased a lot, most join in hdvnbits (a.k.a torviet). However the amount of old torrent remains pretty much. It has a large amount of software (full cracked) and ebooks (Vietnamese) torrents. If you are Vietnamese, you just need to activate account by 10k VND sms and you will have 1 month to download all of software and ebooks torrents that you want.