Sometimes topic url is like this: /t1-forum-topic-post

And some other times topic url is like this: /t1-topic

How can i make my topic urls being like the 2nd that i have just shown you?

Thanks 

Topic URL's should be t = topic, the number of the topic, and the title of the topic.  What exactly do you want to do?

Not to have the title of the topic

There is no way to change the way the forum does the links for topics, forums, etc.

Have you understand what i need?

Not like this: 

But like this: 

I understand what you want.

And? There's no solution?

This is not a issue so no there is no solution.  If you mean is there a way to achieve it, I really do not think there is one.

There is NO way to change the URL length they will always be how they are now
The url is made when you post and the servers fix it as it see's fit.