Cambodian nationality law
The Law on Nationality of Cambodia (Cambodian Citizenship) determines who is a citizen of Cambodia under a 1996 nationality law. Cambodian citizenship is typically acquired through ancestry (being born to at least one Khmer parent) or naturalization. Citizenship can also be applied through business investments and donations. Dual nationality is permitted, although dual nationals may be viewed as Cambodian citizens in court proceedings.
Base on legal article of Khmer Mekong Law Group said that there are a few methods that foreigner can apply or claim Cambodian citizenship.