 Nyorai kupfuurira kweiyi ndima - Kubva muna 1968 kusvika muna 1981 sango repaki rakashandiswa senzvimbo yemagandangaweCommunist Party yeThailand. Musi wa 1 Chivabvu 1995 nzvimbo iri muKhao Polok Lon National Forest, pakutanga yainzi Namtok Than Thip Forest Park, yakaziviswa seKhao Kho National Park. Ongororo yakaitwa musango reKhok Sam Sang, sango reKhao Polok Lon, sango reKhao Pang Kho uye sango reWang Chompu munharaunda yedunhu reLom Kao, dunhu reLom Sak, dunhu reKhao Kho nedunhu reMueang Phetchabun mudunhu rePhetchabun musi wa16 Nyamavhuvhu 2001. Gare gare musi wa 18 Chivabvu 2012 Khao Kho National Park, ine nharaunda ye 125 km2 yakaziviswa kuti ipaki yenyika uye inotarisirwa neProtected Areas Regional Office 11 Phitsanulok. 