. "Ni\u00EAn Hi\u1EC7u" . "era name" . . "Vietnamese" . "reign era" . "Era name" . "Vietnam" . "ni\u00EAn hi\u1EC7u" . . . . . "reign or era title" . "Vietnamese era name" . "reign era (date)" . "era names" . . . "reign name" . "era name(s)" . . "Vietnamese era name" . . "Reign era date" . . . . "Vietnamese eras" . "Vietnamese Eras" .