Perhaps you should try some spelling variations:
"theoretical physicists" » "theoretical physicist", "theoretical physics", "theoretical positions"
"theoretical geophysics" » "theoretical physics", "theoretical astrophysics", "theoretical mechanics"

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: (("theoretical physicists") OR ("theoretical geophysics")).
• Removing quotes may allow a broader search: (( theoretical physicists ) or ( theoretical geophysics )).
• Adding a wildcard symbol may retrieve word variants: (("theoretical physicists") or ("theoretical geophysics"))*.