A social entrepreneur in the Philippines is engineering a grassroots revolution in the retail industry. His group is working with small neighborhood shops known as sari-sari stores. These vendors supply millions of Filipinos with their daily essentials. Most sari-sari operators are women trying to supplement family incomes, but they often struggle to make a profit. In this episode of Asia Insight, we follow the group's trainers as they help the shopkeepers turn their businesses around - and leverage the power of networking.