Download the Chuon Nath Dictionary for Khmer for PC in unicode. This is a great resource, and is official. It works with both 32-bit and 64-bit Windows based systems and is Java based so should be multi-platform (Windows and Linux, but supposedly not with Mac yet).
Download it here:
Download “Electronic Unicode Chuon Nath Dictionary”8mrhncoul4 – Downloaded 5286 times –