I will be in Cambodia and would like to visit some Pathologist that spent time here at the University of Colorado with me. They would like me to give a couple classes at the Hosp to the Histology Lab. I will be coming from Phnom Penh by bus and spend around one week with the Drs in Ho Chi Minh City. I am not sure of the timing but it will be in Dec 09. Will I be able to get a visa in Phnom Penh for the week when I know the exact dates?