T?i ?ây ngoài s? ?a d?ng v? nh?ng s?n ph?m trò ch?i thì vi?c ??ng ký, ??ng nh?p K8 luôn ? m?c ?? an toàn, ??m b?o cho ng??i ch?i luôn ? m?c tuy?t ??i. DV1 contributed to your organizing from the manuscript, executed the literature overview, wrote the first draft from the manuscript; VR planned with the manuscript and supplied the critical