Here is the raw byte sequence in hex
e0 ae b8 cc 87
20 20 20 20
e0 ae a8 e0 ae bf cc a3
This is your browser's rendering
ஸ̇ நி̣
Here is now Safari renders it
Version 9.0.2 (11601.3.9)
Here is how Chrome renders it
Version 49.0.2623.112 (64-bit)