Malaysian department-store operator Parkson is likely to quit operating full-scale stores in Vietnam after years of losses. At one stage the company had 10 stores in the country and was confident of long-term success given it was the first overseas department-store brand to enter the market.  This week, Singapore-listed Parkson Retail Asia announced that, subject to shareholder approval, it will sell the Parkson TD Plaza Shopping Centre it anchors in the northern port city of Haiphong for U