Improve the reliability of power supply for the 22kV, 35kV power grid after 110kV Tho Xuan, Cam Thuy, Thieu Yen, Ngoc Lac, Thieu Hoa, Dong Son, Vinh Loc, Thach Thanh, Ha Trung, Hau Loc substations according to the multi-divided - multi-connected (MDMC) plan in 2026