private void quiĐịnhToolStripMenuItem_Click(object sender, EventArgs e)
        {
            panelSV.Controls.Clear();
            UC_SV_Qui_định temp = new UC_SV_Qui_định(this);

            panelSV.Controls.Add(temp);
            temp.Dock = DockStyle.Fill;
            temp.BringToFront();
            panelSV.BringToFront();
            this.Text = "Tra cứu/Qui định";
        }
        private void btnTraCuuQuyDinh_Click(object sender, EventArgs e)
        {
            panelSV.Controls.Clear();
            UC_SV_Qui_định temp = new UC_SV_Qui_định(this);

            panelSV.Controls.Add(temp);
            temp.Dock = DockStyle.Fill;
            temp.BringToFront();
            panelSV.BringToFront();
            this.Text = "Tra cứu/Qui định";
        }