Copy Snippet will show you as (suggested) snippets of any copied letters. It exists 2 copy commands that used Clipboard or not used it. You can use it very easy if you keybind its commands.
You can use copy command by short cut key. You will set in keybindings.json (Code|File > Preferences > Keyboard Shortcuts) add binding to copy command:
If you want not use Clipboard, you can use another copy command.