Thank you for your advice as below, I have discussed with the you before traveling to Cambodia. I can be in Cambodia duration longer period than others but I want to take a leave for go to upcountry when I return to Thailand. I hope that my request will be given due consideration. I can understand your reasons that could not be approved by the time I requested. So I want you advice again, In this case how long can approve take leave or I can't take leave at during time,