h à ▁n ư ớ c ▁Vi ệ t ▁Nam ) ▁introduced ▁notes ▁in ▁denomin ations ▁of ▁ 5 ▁h à o , ▁ 1 , ▁ 5 , ▁ 1 0 , ▁ 2 0 , ▁and ▁ 5 0 ▁ đ ồ ng ▁dated ▁ 1 9 7 6 . ▁In ▁ 1 9 8 0 , ▁ 2 ▁and ▁ 1 0 ▁ đ ồ ng ▁notes ▁were ▁added , ▁followed ▁by ▁ 3 0 ▁and ▁ 1 0 0 ▁ đ ồ ng ▁notes ▁in ▁ 1 9 8 1 . ▁These ▁notes ▁were ▁dis cont in ued ▁in ▁ 1 9 8 5 ▁as ▁they ▁gradually ▁lost ▁value ▁due ▁to ▁infl ation ▁and ▁economic ▁inst ability . ▁ ▁Second ▁ đ ồ ng ▁In ▁ 1 9 8 5 , ▁notes ▁were ▁introduced ▁in ▁denomin ations ▁of ▁ 5 ▁h à o , ▁ 1 , ▁ 2 , ▁ 5 , ▁ 1 0 , ▁ 2 0 , ▁ 3 0 , ▁ 5 0 , ▁ 1 0 0 , ▁and ▁ 5 0 0 ▁ đ ồ ng . ▁As ▁infl ation ▁became ▁en demic , ▁these ▁first ▁bank notes ▁were ▁followed ▁by ▁ 2 0 0 , ▁ 1 , 0 0 0 , ▁ 2 , 0 0 0 , ▁and ▁ 5 , 0 0 0 ▁ đ ồ ng ▁notes ▁in ▁ 1 9 8 7 , ▁by ▁ 1 0 , 0 0 0 ▁and ▁ 5 0 ,