Department of Computational Science and Engineering, Faculty of Information Technology, VNU University of Engineering and Technology, Hanoi, Vietnam.|Knowledge Technology Laboratory (KTLab), Faculty of Information Technology, VNU University of Engineering and Technology, Hanoi, Vietnam.|Department of Computational Science and Engineering, Faculty of Information Technology, VNU University of Engineering and Technology, Hanoi, Vietnam.|Department of Computational Science and Engineering, Faculty of Information Technology, VNU University of Engineering and Technology, Hanoi, Vietnam.