Increase Concurrent Search session in compliance acclerator

Hello People,

EV 9.0.2 windows 2003 + CA server 9.0.2 + CA client 9.0.2

My compliance team when tries to perfrom a manual on multiple dept the manual search runs one at a time i.e if i have 5 dept and i run a manual search on all 5 dept at the same time it the search would start one a time, so once one search is completed on particular dept it would start another.

Hence i am looking for any setting where i can increase the concurrent session for manual search. I have verified the setting in CA console going in setting but haven't got more in it about the setting.