which office holder's military branch is vietnamese national army and vice president is nguyễn cao kỳ ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_militaryBranch dbr_Vietnamese_National_Army sep_dot var_uri dbo_vicePresident dbr_Nguyễn_Cao_Kỳ sep_dot var_uri a dbo_OfficeHolder brack_close