The Council of American Overseas Research Centers and the US Deptartment of State are offering PhD and Senior level Fellowships for social science research through the Center for Khmer Studies. You must be a Cambodian or US citizen to apply.
This program is open to Cambodian and U.S. doctoral candidates and scholars who have already earned their Ph.D. in the social sciences and humanities. Scholars can pursue research in other countries in mainland Southeast Asia (Thailand, Laos, Vietnam, Burma, Southern China) provided that part of their research is undertaken in Cambodia.
More details about the fellowship here. Deadline is 30 November 2014.