Routes

I don't know exactly how to search for this in the forums, but how do I do the following.

Let's say that a user types in:
www.domain.com/admin/newpage/1

or

www.domain.com/search/name/donald

How do I make this go to a default controller and have it process all of parameters?

Like for the first one the parameters would be admin, newpage, 1.

And for the second one the parameters would be search, name, donald.

Thanks in advance for the help.