Perhaps you should try some spelling variations:
nurse » nurkse
nurses » nurkses
purse » pursue, pure, perse
purses » pursues, pures, perses, purves, purposes
practitioner » practitioners
pursues » pursued, pursue
curse » course, curso, cursa
cursos » curso, recursos

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: (( (nurse OR purse) practitioner ) OR (( (nurses OR (purses OR pursues)) OR (curse OR cursos)) practitioner ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( (nurse OR purse) practitioner ) OR (( (nurses OR (purses OR pursues)) OR (curse OR cursos)) practitioner ))~".
• Adding a wildcard symbol may retrieve word variants: (( (nurse OR purse) practitioner ) OR (( (nurses OR (purses OR pursues)) OR (curse OR cursos)) practitioner ))*.