*Central beats rival TCC to win Vietnam business. *Vietnam deal takes Casino asset sales to 4.2 bln euros. Casino, facing weak markets in Brazil and fierce competition in France, has said it aimed to raise around 4 billion euros this year by selling off businesses in Thailand and Vietnam plus the sale of real estate assets in Latin America.
*Central beats rival TCC to win Vietnam business. *Thai tycoons jostle for deals in Vietnam. SINGAPORE/ BANGKOK, April 29- France's Casino Group agreed to sell its Vietnam unit to Thai conglomerate Central Group for 1 billion euros including debt, giving the retailer respite from a debt pile that pushed its credit rating to junk.