Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.
The top three should be Phnom Penh, Battambang, then Siem Reap. Including Takeo at #2 is bizarre, there's no town there that would place it that high. Sihanoukville is not at #3 but calling it Kampong Saom is not something anyone would guess.