Perhaps you should try some spelling variations:
combining generator » combining general, combining genetic, combining generic
commanding general » combining general, commands general, comparing general
commander general » commerce general, cancer general, computer general
army » arms

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((commanding general) OR (commander general))) OR (combining generator)) of the united states army.
• Adding a wildcard symbol may retrieve word variants: ((((commanding general) or (commander general))) or (combining generator)) of the united states army*.