does anyone know if there is a direct bus to/from phetchabun? or if not, phitsanalok?

i mean one that doesn't require you get off and change in bangkok, its for our 15 year old daughter so don't want her to mess about in bkk

There is a bus Phuket-Chiang Rai, which a friend used already to get to Phitsanulok without changing in BKK. I don't know if Phetchabun is on the way, but...