Cambodia accounts for more than 200,000 Facebook users, mostly to connect with friends and professional networking.
Although the government has denied ordering the sites censored, a leaked memo indicates it indeed ordered access cut.
For decades, Cambodians here have been much more isolated from their fellow countrymen than from their Lao neighbors to the north.
The leaked e-mail suggests the anti-government website KI Media has been a particular target of the government.
Cambodia has more than 100,000 teachers nationwide, but their budgeted salary is only $40 to $60 per month.
Surin was once part of a wider Khmer empire that encompassed parts of modern-day Thailand and Vietnam.
The Mustin, which is commanded by an American-Cambodian, arrived in Preah Sihanouk province, for a five-day visit.
Cambodia has the highest per capita population of youth: those between 10 to 24 years old make up 35 percent of the populace.
VOA Khmer spoke with David Chandler, a Cambodian scholar and author and former diplomat posted in Phnom Penh.
Cambodian-Americans face social, cultural and economic difficulties, along with similar communities from Laos and Vietnam.