Old post on an NGO with a difference tackling speech therapy here:
https://cambodiaexpatsonline.com/post134 ... py#p134051

Here they are again in a new article from Channelnewsasia on Cambodian children with special needs:

Tackling Cambodia’s desperate need for speech therapy
By Jack Board Posted 31 Oct 2016 16:53

PHNOM PENH: When her daughter was born with Down syndrome, Yu Kanha was left in despair.
Life can be a constant challenge for many poor families in Cambodia as it is. She knew that nothing would come easy for little Serey.

“When I talk about this story I always cry. We have many difficulties,” she said, sitting on a plastic seat in a classroom in Phnom Penh...
http://www.channelnewsasia.com/news/asi ... 43084.html

Another (mostly) positive story about Cambodians helping handicapped kids in Cambodia, this time about a teacher for the blind:

Cambodian teacher lights up world for blind students
By Pichayada Promchertchoo Posted 03 Nov 2016 11:24 Updated 03 Nov 2016 20:05

PHNOM PENH: Shafts of golden sunlight streamed through a row of green-framed windows. They glinted on dozens of shiny symbols – an unfamiliar representation of the Khmer and English alphabets as well as Hindu-Arabic and Roman numerals. Each of them was formed by small raised dots in red, black and blue, glued to white cardboard papers on the mustard yellow walls.

The classroom was a burst of colours. But for its occupants, darkness was all they could see.

"Hello everybody. How are you all doing?" Phalla Neang greeted her students as she entered the classroom. None of them could see her kind face or her broad smile. Yet they could tell from the familiar voice it was Miss Phalla who would be teaching them mathematics that morning...

[But...]Despite the national education-for-all scheme, public schooling remains almost inaccessible to blind Cambodians. Educational materials for them are inadequate and teaching techniques at public schools are not designed for those who cannot see. Many blind children have ended up on the streets in big cities as beggars.

According to the Association of the Blind in Cambodia’s (ABC) most recent statistics, about 52,000 people in Cambodia are blind. Many of them are struggling in their day-to-day lives...
Full article here:http://www.channelnewsasia.com/news/asi ... 43630.html