“…Our model is quite different from other studies related to Vietnamese vectors, Vietnamese segments, etc. (Hoang et al, 2007;Le et al, 2008;Nguyen et al, 2009), research related to the CURE algorithm (Guha et al, 1998;Yan-Hua et al, 2011;Nian-yun et al, 2009;Ertöz et al, 2002;Kaya and Alhajj, 2005;Ying et al, 2008;Rani et al, 2014), recent studies about Vietnamese sentiment classification (Ha et al, 2011;Bang et al, 2015;Kieu and Pham, 2010;Vu and Park, 2014;Hoanh-Su et al;Anh and Dau, 2014;Phan and Cao, 2014;Duyen et al, 2014;Bach et al, 2015;Trinh et al, 2016), sentiment classification (Manek et al, 2016;Agarwal and Mittal, 2016a;2016b;Canuto et al, 2016;Ahmed and Danti, 2016;Phu and Tuoi, 2014;Tran et al, 2014;Phu et al, 2016;Phu et al, 2017a;2017b) and unsupervised classification (Turney, 2002;Lee et al, 2002a;van Zyl, 2002;Hegarat-Mascle et al, 2002;Ferro-Famil et al, 2002;Chaovalit and Zhou, 2005;Lee et al, 2002b;Gllavata et al, 2004).…”