I understand that you are not from English speaking region or part of the world, so it's the reason why your post maybe a bit hard to understand, but any ways, I am assuming that the bolded part is definitely a typo, and that what you meant to say was that there is no need to try to get back that which is already or initially lost to gambling, because I don't see any need or reason why any one would want to get back what they initially won if they have not lost it.

But in gambling, people are of different characters and so also does luck differs for everyone or most people, some actually have formed the habit of chasing after their loses and it seems to work well for them most of the time, while others who try end up losing much more than they initially lost.
My counsel would be that gamblers find what works well for them and follow it, no need trying to do something simply because another does it and it works for him or her.