In 1979, Vũng Tàu was broken away from Đồng Nai and merged with the Côn Đảo islands (formerly part of Hậu Giang Province), forming the new Vũng Tàu–Côn Đảo "special zone".
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The Ngã Bảy district of Hậu Giang Province - named Tân Hiệp from its creation in 2005 to late 2006