Though, @ikpromotion is specialized in GEO domains But on the 1st and 2nd links bellow; you can get it in a precised format.
You can study GEO Domains here better in a precised form written by @ikhalyfah This Guy is really getting it aright on both brandables and GEO domains.
Here is another thread for studying Squadhelp platform on the types of domain and
Here is another link to the secrets of acquiring good expired domains written by @liftkid at nairaland
If you can read and are intelligent you should be able to understand and catchup with brand name combos.