Vietnamization strategies and extensionism in Cambodia are implementing through its various hidden and open policies:
1. Don Dien = through sending military and agents to infiltrate inside the Cambodian government. Also send illegal immigrants to assimilate with Cambodian people to expect for ousting or voting in favor in their long run. Vietnam had success with this Don Dien policy of extensionism with Champa, Prey Noror and Khmer Kampuchea Krom.
2. Doi Moi = is new innovative policy adopted by HCM to welcome new coming of modernization which this philosophy stresses on economic development. Money is their tool to absorb other territory land. Vietnam can buy, bribe high ranking officials or subsidize provision to local people in order to have their legitimacy as well as domination in that territory/area. Vietnam now is using this Doi Moi extensionism in Lao and Cambodia. Border development and Vietnamese business tycoons in Cambodia are the frontliners for their Doi Moi extensionism. In this Bangkok Post News, Vietnam is stepping its legality to SA for its hidden swallowing of Cambodia of Doi Moi.
Nowadays, the kleptocratic family system in Cambodia is a very effective tool for Doi Moi extensionism of Vietnam in Cambodia.