SINGAPORE : Vietnamese education firm Nguyen Hoang Group has paused the sale of a minority stake that could potentially value its business at around $1 billion as bids came short of its expectations, two sources with knowledge of the matter told Reuters. The Ho Chi Minh City-based group hired JPMorgan earlier this year to explore selling a minority stake of potentially 10 per cent to 20 per cent, which attracted interest from private equity firms and other education companies, the sources said.