Complex sentence: Dong Ampham National Biodiversity Conservation Area is the protected area which lie within the Attapeu Province (on the northeastern part) and Sekong Province (on the southeastern part), in the southeast corner of Laos on the border with Vietnam.
Split into simpler sentences: Dong Ampham National Biodiversity Conservation Area (NBCA) is the protected area which lies within the Attapeu Province (on the northeastern part) and Sekong Province (on the southeastern part). It is situated in the southeast corner of Laos on the border with Vietnam.