NGOs in Thailand

 A list that I've found
 http://p2pfoundation.net/NGOs_in_Thailand

 The recommended organizations from the thai expat's blog
 http://redmudstain.wordpress.com/2013/11/26/ngos-in-chiang-mai/

 NGOs work for Hill tribe people

• IMPECT
   http://www.impect.org/index.php
• Life Development Center
   http://www.ldcl.org/LDC_Brochure_Final_for_site.pdf
   http://www.ldcl.org/Charity_template_about_us.html

 Others 

• CARE INTERNATIONAL (Raks Thai)
  http://www.raksthai.org/new/index.php

 Regarding Paper

•  'The impact of NGOs'movement in the educational support for minority in Northern Thailand'

 http://203.131.210.100/conference/wp-content/uploads/2011/06/Movement-in-the-Educational-Support.pdf