In 1988 a classified Vietnamese Ministry of Public Security’s in-house professional journal published this article offering ideas on how to utilize the “psychological characteristics” of the ethnic Chinese in the interrogation of suspected “Chinese spies”.  At the time the article was published, the once-close alliance between the Vietnamese and Chinese Communist Parties, which Mao Zedong described in 1967 as being “as close as between lips and teeth”, had deteriorated into a vicious military and political conflict between the two former allies.  Chinese efforts to collect intelligence on and to foment internal opposition against the leadership of the Vietnamese Communist Party were of special concern to Vietnam’s security service, and ethnic Chinese residents of Vietnam naturally became a primary focus of Vietnam’s counter-espionage efforts.

This article, published in a classified Vietnamese Ministry of Interior publication, asserted that Vietnam’s economy required international cooperation and support, saying “no country can close its doors and still expect to be able to develop and make progress.” The article also states that the Ministry was now gradually allowing identified “spies” to enter Vietnam so that their activities could be covertly surveilled by the Ministry’s counter-espionage officers

Trần Quốc Hoàn reviews cases against foreign and domestic spies in the Vietnam Wars.

In 1971, North Vietnam’s Public Security Service (the North Vietnamese equivalent of the former Soviet KGB, known at the time as the Ministry of Interior) held a national conference to review the status of the Service’s efforts targeted against the Vietnamese Catholic Church over the past decade and a half and to formulate plans and policies for its future operations directed against the Church. In this speech given at the opening of the conference, Party Politburo Member and Minister of Public Security General Tran Quoc Hoan [Trần Quốc Hoàn], outlined the successes that he said had been achieved in gaining the sympathy and support of the Catholic “masses” and in combatting what he called “reactionaries exploiting the Catholic religion”.

VWP Party Politburo Member and Minister of Public Security General Trần Quốc Hoàn's comments about "transforming" the Catholic Church in Vietnam.

The COSVN seeks to support the Buddhist and Catholic protest movements in South Vietnam.

The COSVN seeks to shape protests led by a Catholic priest against corruption in South Vietnam.

A letter, presumably written by Le Duan, offers a clarion call for war in the wake of the Paris Peace Accords.

The COSVN seeks to improve Cambodian-Vietnamese relations in the wake of several "minor clashes over various problems."

The COSVN offers 3 proposals for improving relations with Cambodian revolutionaries.