Perhaps you should try some spelling variations:
"physical chemist" » "physician chemist", "physical chemical", "biophysical chemists"
"physical chemistry" » "physician chemistry", "physical chemicalry", "biophysical chemistsry"
"physical schemas" » "physical sciences", "physical chemical", "physical science"

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