$ sudo apt-get update
$ sudo apt-get install fonts-tlwg-sawasdee 

fonts-tlwg-sawasdee is installed in your system.

Make ensure the fonts-tlwg-sawasdee package were installed using the commands given below,

$ sudo dpkg-query -l | grep fonts-tlwg-sawasdee *

You will get with fonts-tlwg-sawasdee package name, version, architecture and description in a table

fonts-tlwg-sawasdee package basic information: