First of all welcome to the forum.
Are you currently living in Phils? If yes:
In my opinion the UK government is encouraging those who wants to adopt to choose those childrens first who are in the waiting list or needs a new family within the UK.
So you're chance of gettting a new family from UK for your son is slim unless you knew a friend or relative who currently living here and happy to adopt your child.
Keep looking for info on the internet though and goodluck to you and your son.