which office holder's military branch is army of the republic of vietnam and vice president is nguyễn cao kỳ ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_militaryBranch dbr_Army_of_the_Republic_of_Vietnam sep_dot var_uri dbo_vicePresident dbr_Nguyễn_Cao_Kỳ sep_dot var_uri a dbo_OfficeHolder brack_close