A fundraiser is a social event that is arranged in order to raise money.
In this case the money is raised for the Humanitarian Services for Children of Vietnam.

There are other organisations in Hanoi that are doing remarkable work for
the disadvantaged in Hanoi.

http://www.koto.com.au/koto_hanoi.asp
"KOTO is about creating a safe environment where a small group of extremely vulnerable young people can learn and grow - because through education and skills comes empowerment and the path to a brighter future." --- Mr Jimmy Pham, KOTO Founder and Director