Approval for bid results: In some provinces (such as Phu Yen, Quang Ngai Provinces and Ho Chi Minh City ...), after winning the bid, the investors have written request again for bid prices and prices reduction in surrounding localities (when there are differences in prices) even though the contractor fully meets the criteria in the bidding documents: Technical and financial criteria. Prices determination in each locality depends on many factors, including the nature and scale of bid winning of each item as well as the business strategy and competitiveness of the enterprise at each time. It is unreasonable to charge the price in this local as the same price in other locations. This makes difficulties, delays time of signing contract and supply for contractors and clinics.