Rāingān kānwičhai rư̄ang kānplīanplǣng thāng sētthakit, kānmư̄ang, sangkhom, læ watthanatham nai chumchon chātphan Kūai læ Yō̜ : kānsưksā prīapthīap chapho̜ karanī = The economic, political, social, and cultural changes in Kui and Nyo ethnic communities : a comparative case study