Perhaps you should try some spelling variations:
"theoretical physicist" » "theoretical physicists", "theoretical geophysics", "theoretical basics"
"theoretical physics" » "mathematical physics", "theoretical analysis"
"theoretical basicss" » "theoretical basics", "theoretical basis", "theoretical business"

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