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

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 physicist") OR ("theoretical physicists"))) OR ("theoretical geophysics")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"theoretical physicist\") OR (\"theoretical physicists\"))) or (\"theoretical geophysics\"))".
• Removing quotes may allow a broader search: (((( theoretical physicist ) OR ( theoretical physicists ))) or ( theoretical geophysics )).
• Adding a wildcard symbol may retrieve word variants: (((("theoretical physicist") OR ("theoretical physicists"))) or ("theoretical geophysics"))*.