Flights from Siem Reap to Danang

Does anyone know if I can fly directly to Danang from Siem Reap...or even Phenom Penh? Would perfer Siem Reap, but even though there are plenty of mentions of service opening inmy google search, I've not found any direct flights so far--only going in the opposite direction from Danang to Siem Reap (Vietnam Airlines) or by way of Singapore (Silk Air). Was wondering if there was a smaller or lesser known airline that makes the journey?

Thanks for your help!
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