if people not getting seats from chennai central to odisha/ranchi/dhanbad...then book from perambur to ranchi/dhanbad/odisha you will get seat from there easily.
please wait...Translate to HindiAgar log Chennai Central se Odisha/Ranchi/Dhanbad tak seat nahi mil rahi hai...toh Perambur se Ranchi/Dhanbad/Odisha ke liye book karlo, wahan se aasani se seat mil jayegi.