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That's so true! one month is not enough just to move around the place. You sort of need more than a month or maybe a lifetime haha

You can exit Cambodia or Laos and return to Thailand by bus.

That's what I am planning, still researching places hehe.

Ah yes, CAmbodia is open for tourists. I went to Siem Reap for one week and returned. I've heard that northern Thailand is nice especially Chiang Mai. I just went to the south, Phuket, because of the beach.