I saw this when a friend shares on facebook, it's so interesting to recommend more research blogs or site related to Khmer language matter.
Kheng.info is one website about that. There is a Khmer Segmentation tool which is about to work around 1000 characters. The website is built with around 3 millions line Khmer corpus and it's a dictionary website of English-Khmer and Khmer-English with audio in Khmer.
It would be an interesting website for other researchers or users to discover there.