list sports managers who managed bulgaria national under-21 football team and sriwijaya f . c . ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_managerClub dbr_Bulgaria_national_under-21_football_team sep_dot var_uri dbp_managerclubs dbr_Sriwijaya_F.C sep_dot sep_dot var_uri a dbo_SportsManager brack_close