Seven years after turning down a US$2.5 billion offer from Coca-Cola, Vietnam’s biggest home-grown beverage company is seeking a strategic partner that can invest US$3 billion to help make it the next Red Bull.Tan Hiep Phat Beverage Group, known as THP locally, is open to mergers and acquisitions to become one of Asia’s top drinks makers, Tran Qui Thanh, the founder of the closely held business said. The company is looking to expand sales in neighbouring Southeast Asian countries, after…