Is there any recommended reading you have on this? In general, all the foreign conquests that succeeded in India even later were when it was fragmented into smaller kingdoms.
He barely made it to the border of the largest empire in contemporary India, by geography. Even the parts of current Pakistan he conquered were nowhere near major powers in the subcontinent.
That was as far as he got before his army rebelled and forced him to abandon further conquest.
Not so much about Chanakya, but about that period in India, and describes in depth how the history was pieced together.