Perhaps you should try some spelling variations:
"theoretical physicists" » "theoretical physics", "theoretical physicss", "theoretical geophysicss", "theoretical basicss"
"theoretical physicist" » "theoretical physics", "theoretical geophysics", "theoretical basics"
"theoretical positions" » "theoretical predictions", "theoretical questions", "theoretical foundations"

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