Landslides represent a significant geological hazard in Vietnam, affecting various regions and posing threats to human lives, property, and the environment. On October 12, 2017, a massive landslide struck Khanh Village, Hoa Binh Province, Vietnam, resulting in 18 fatalities and the destruction of five houses. The event highlighted the vulnerability of limestone regions in Vietnam to landslides, particularly during periods of heavy rainfall. This paper first provides preliminary survey results to examine the cause and mechanism of the landslide. The results show that heavy rain was triggering factor in the 2017 Khanh waterfall landslide. Using the LS-RAPID computational model, we reproduce the 2017 event and assess the risk of future landslides from the remaining steep slope of the Khanh waterfall area. The findings provide valuable data to assist authorities in enhancing landslide hazard assessment, as the remaining steep slope poses a significant risk of future landslide occurrence.