Why can I not find my Youtube channel when searching by it’s new name?

I had a youtube channel called Alhaitham Corp with Alhaitham as first name and Corp as last name. Yesterday, I changed the name to an Arabic name الهيثم للبرمجيات with الهيثم as first name and للبرمجيات as the last name. The name was changed successfully and anyone can see the new name. When I search for it on Youtube with the old name, I find it as the first one in the result set. But when searching with the new name, I do not find it at all. So, what I am saying is that the name changing process took effect in all places but users can not use the new name to search for the channel.
The page with the new name displayed

The page in search results with the old name