For various reasons I regularly travel around the place via public transport, and when I require to do so one just does a google search as mentioned above. I was surprised on where one could get to. You do have to pick your times but most such services do meet trains. A point I will make is VLine is a government owned company providing certain transport services. It is not an agent for every small service in the state.PTV is defnitely better than Vline, they have some, but not all of the non Vline rural bus routes. Whereas Vline pretends that if they don't franchise them, then the routes don't exist.
While people on this forum are likely to be a bit more savy than most. (How many ordinary people even know about the PTV website?) But the average mug who checks the Vline website to see what public transport is available in the country gets this woefully incomplete map, inferring that dozens of towns don't have a public transport bus service. https://www.vline.com.au/getattachment/f8a1e2c3-5d60-4abe-b608-2bc18e9f8197/V-Line-Network-Map
Despite the obvious deficiencies in the PTV map...as an outsider or overseas tourist I wouldn't be looking for the PT Authority of the state or country I was in...I simply Googled 'bus from Bairnsdale to Omeo' and the PTV t/t came up.