Perhaps you should try some spelling variations:
"theoretical geophysics" » "theoretical physics", "theoretical astrophysics", "theoretical mechanics", "theoretical geophysical"
"theoretical physicist" » "theoretical physicists", "theoretical physics", "theoretical basics"
"mathematical physics" » "mathematical physical"

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