see island named Koh Rung, Thailand but when try to research it always comes up Koh Rong,Cambodia. Want to stay on Thailand side so I don't lose my visa.
Koh Rang maybe? National park island near Koh Chang. Hardly anybody stays there. Most visit on snorkeling daytrips.
Thais often interchange Us and As when transliterating.
e.g. tam arai/tum arai, (what are you doing)
som tam/som tum (papaya salad)