You can check to see if your visa result has been returned from the Australian Embassy to the Australian Visa Application Centre and whether it is ready for collection either at the Visa Application Centre in Bangkok or courier to your address (EMS).
You can track your application by entering your Receipt Number
given to you during the Visa application Submission and your Date of Birth
For application applied on or before 23 March 2013: Track Your Application
For application applied after 23 March 2013: Track Your Application (New)