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OxalisOxalis Company Limited (Oxalis) is a company of OneStep Viet Co., Limited providing professional on CSR services (Corporate Social Responsibility), climate change and sustainable development.Oxalis adventure tours has been established in July 2011 and headquartered right at Phong Nha Ke Bang National Park where we organize adventure tours to the heart of the national park, where Hang En (Swallow cave) and Son Doong cave, the world’s biggest cave has been discovered recently. Oxalis adventure tour obtains certificate of international tour operator issued by National Tourism Bureau of Vietnam.Oxalis is in cooperation with Phong Nha Ke Bang National Park management to organize adventure tours to the best parts of the world (Son Doong and other destinations).Oxalis is formed up from a professional team and experts on tourism, safety and sustainable development to provide best services to the adventure travelers.