You can use:
bind x vsay_team careful
bind x vsay_team clear
bind x vsay_team cover_me
bind x vsay_team got_him
bind x vsay_team got_it
bind x vsay_team hold_position
bind x vsay_team man_down
bind x vsay_team need_backup
bind x vsay_team obj_complete
bind x vsay_team take_cover
bind x vsay_team under_fire
bind x vsay_team sniper
bind x vsay_team check_fire
bind x vsay_team fire_hole
bind x vsay_team grenade
bind x vsay_team affirmative
bind x vsay_team negative
bind x vsay_team check_out
bind x vsay_team yes_sir
Grey Ghost