Perhaps you should try some spelling variations:
professions » professional, professionals, professors
profession » professional, professor
professionals » professionalals, professorals, professional
professionalals » professionalalals, professoralals, professionally, professional, professionalism
professors » professor
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: "(professions or (profession or ((professionals OR professionalals) or professors))): training, education and (demographics" or geographic")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "(professions OR (profession OR ((professionals OR professionalals) OR professors))): training, education AND (demographics" or geographic").
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(professions or (profession or ((professionals OR professionalals) or professors))): training, education and (demographics\" or geographic\")".
• Removing quotes may allow a broader search: (professions or (profession or ((professionals OR professionalals) or professors))): training, education and (demographics or geographic ).
• Adding a wildcard symbol may retrieve word variants: "(professions or (profession or ((professionals OR professionalals) or professors))): training, education and (demographics" or geographic")*.