Perhaps you should try some spelling variations:
professions » professionals, professors, professionalss
professoral » professor, professors, profesional
professional » professoral, professionalsal
profession » professor, professionals
demographics" » demographic"
geographic" » demographic"

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 (professional OR professoral)) or profession): training, education and (demographics" or geographic")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "((professions OR (professional OR professoral)) OR profession): training, education AND (demographics" or geographic").
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((professions or (professional OR professoral)) or profession): training, education and (demographics\" or geographic\")".
• Removing quotes may allow a broader search: ((professions or (professional OR professoral)) or profession): training, education and (demographics or geographic ).
• Adding a wildcard symbol may retrieve word variants: "((professions or (professional OR professoral)) or profession): training, education and (demographics" or geographic")*.