not sure what you mean by "shortcuts" here. The two "accelerator" UIs that Fusion supports are: Hotkeys (a single key way to invoke a command), and the Shortcut toolbox (the UI that comes up when you type "s").
Hotkeys can be bound to any command, and are edited by using the "three dot" menu next to the command dropdown. You can assign a hotkey, or edit the hotkey that is already assigned:

The Shortcut toolbox, you can think of as an alternate toolbar - a way to group some commands into another UI that you can quickly call up, and access those commands. There are two ways to add a command to that toolbox. In the above UI, if you click on "Pin to Shortcuts", it will get added there. The second is the search capability in the toolbox itself. This is not a command line interface, and it is not meant as an advanced search interface. It is just a way to try to find another command that you want to add to the toolbox, by name. So, yes, it is not a super intelligent search UI. It's intent was to just narrow down the list of commands to help you find the one you really wanted to add to the toolbox. It was intended to be used just to set up the tools, and therefore rarely. Once you have the toolbox set up the way you like it, you don't very often need to use Search. So, investing a lot of effort into supporting wildcards or other advanced search was just not cost effective.
Jeff Strater
Engineering Director