Perhaps you should try some spelling variations:
practitioner » practitioners
perses » perseus, persas, perse
purse » pure, perse, pulse
pursue » pursued
curse » course, curso, cursa
proponen » propone, proposed
cursos » curso, recursos
curves » curvas

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( nurses practitioner ) OR ( ((((perses OR purves) OR ((purse OR pursue) OR curse)) OR proponen) OR (cursos OR curves)) practitioner ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( nurses practitioner ) OR ( ((((perses OR purves) OR ((purse OR pursue) OR curse)) OR proponen) OR (cursos OR curves)) practitioner ))".
• Adding a wildcard symbol may retrieve word variants: (( nurses practitioner ) OR ( ((((perses OR purves) OR ((purse OR pursue) OR curse)) OR proponen) OR (cursos OR curves)) practitioner ))*.