guys, how to find missing people? Better to use help of private detectives or something like that?

private detective for example

Private investigator helped me to find missing bride in Melbourne. I see post with contacts and tried to check it. Because my bride stolen all my money. I can say that private detective found her not so long ago.

I was searching  a friend I met in the past online, but I have not good lucky. But I can't be helped becuse I don't know the surnames. I hope she will be fine