Perhaps you should try some spelling variations:
professions » profession, professionals
professorals » professionals, professors, processors
professionalo » professionals, professionally, profesional
professionalisme » profesionalisme, professionalize, professionals, professionalse
professionalism » professionals

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