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Bidders offered yields for three-year bonds at 12.15-12.50 percent, above the ceiling of 12.10 percent, and bid for five-year debt at 12.40-12.50 percent, higher than the cap of 12.15 percent, the exchange said in a statement. The treasury had sought to sell 1 trillion dong ($48 million) each of three-year government bonds and five-year debt.