NGOẠI https://www.youtube.com/watch?v=IsRetRvTvU&index=3&list=PLOFbQj3j2KcPZFqfhQvtEbpYdX56xHfAe NỘI https://www.youtube.com/watch? list=PLOFbQj3j2KcMnhxnpkk4Y48GgTOqJoS8B&v=nhC9QyVw280&app=desktop NHI https://www.youtube.com/playlist?list=PLOFbQj3j2KcPqshKZZNcJtNUEBwtthk7m SẢN https://www.youtube.com/playlist?list=PLOFbQj3j2KcM_c1327VmU25Oy_NzpPfL_ Slide nhi https://onedrive.live.com/?authkey= %21AOMM9iNu5GcCSfA&id=31CB4B9798CB81C3%2113100&cid=31CB4B9798CB81C3 Slide nội https://onedrive.live.com/?authkey= %21ADU47Ey6L7JoQkg&id=31CB4B9798CB81C3%2124022&cid=31CB4B9798CB81C3