Perhaps you should try some spelling variations:
professors » professor, professions
profession » professional, professor
professionals » professionalals, professorals, professional
professionalalsal » professionalalalsal, professoralalsal, professionalism, professionally, professionalisme
professionalalalsal » professionalalalalsal, professoralalalsal
demographics" » demographic"
geographic" » demographic"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: "((professors or (profession or professionals)) or ((professionalalsal or professoralalsal) or professionalalalsal)): training, education and (demographics" or geographic")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "((professors OR (profession OR professionals)) OR ((professionalalsal OR professoralalsal) OR professionalalalsal)): training, education AND (demographics" or geographic").
• Removing quotes may allow a broader search: ((professors or (profession or professionals)) or ((professionalalsal or professoralalsal) or professionalalalsal)): training, education and (demographics or geographic ).
• Adding a wildcard symbol may retrieve word variants: "((professors or (profession or professionals)) or ((professionalalsal or professoralalsal) or professionalalalsal)): training, education and (demographics" or geographic")*.