Chao Bac Tho ! Toi cung dang can thong tin ve nhung van de ma Bac vua tim duoc. Vay Bac lam on cho toi xin dia chi hoac thong tin do voi. Xin chan thanh cam on Bac. De khoi lam phien moi nguoi tren mang , nho Bac mail giup cho toi den dia chi: lan@obihiro.ac.jp