Perhaps you should try some spelling variations:
"theoretical physicists" » "theoretical positions", "theoretical geophysicss", "theoretical basicss"
"theoretical physicist" » "theoretical geophysics", "theoretical basics"
"theoretical physics" » "mathematical physics", "theoretical analysis"
"theoretical topics" » "theoretical tools", "theoretical basics", "theoretical terms"

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