Notice: Uninitialized string offset: 1 in /home/qa.discoveryindochina.com/public_html/wp-content/plugins/dw-question-answer/inc/Akismet.php on line 285 Stay duration in Phnompenh, Koh Rong and Sihanoukville?
You should spend 3 days/2night in each place is enough. If you have time and want to relax on beach, you can stay at Koh Rong and Sihanouville for some days more!