Here's an untold story waiting to be written and maturely, properly analyzed by a Cambodian journalist or a particularly courageous, objective foreign journalist: a THOROUGH chronological list of EVERY visit of a Cambodian senior official (particularly PM, deputy PM, defense minister, interior minister, security personnel) and more difficult to detect, the provincial authority (Ratanakiri, Mondolkiri, Stung Treng, Kampong Cham /Tbaung Khmum, Kandal, Svay Rieng, Prey Veng, Takeo, Kep/Kâmpôt) TO VIETNAM. And vice versa, of EVERY visit of Vietnamese officials to Cambodia. And the "friendship", "cooperation" meetings and conferences. The English press in Cambodia (The Daily, The Post) only covers a fraction of these visits; the Khmer press a bit better. The Vietnam press more comprehensive. I noticed KI Media tried to pick up many of these stories from as many sources; Truth2Power Media a bit more systematic but only very recent, 2013 or so.
In particular, analyze the frequency and the personalities of these visits several weeks leading to a "domestic" boiling point or event and immediately after: 1994 coup attempt, KR re-integration; 1995 assassinations, establishment of grassroots democracy Khmer Nation Party; 1997 events, grenade attack, July coup; these events spilling into July 1998 elections and the aftermath of violent standoff and weeks-long mass protests in front of the Cambodians Hotel; before;after 2002 commune elections; before/after 2003 national elections; its aftermath spilling into 2004 with killing of Chea Vichea; before after 2007 commune elections; before/after national elections; before/after 2012 commune elections; before/after 2013 national elections, particularly weeks leading to July elections of May, June 2013, and the assassination attempt of Sam Rainsy in August 2013; surrounding every forced exile of Sam Rainsy; November, December 2013 during the almost daily peaceful protests at Democracy Square; the Veng Sreng massacre in Jan. 2014; etc.