Perhaps you should try some spelling variations:
practitioner » practitioners
pures » pues, pares, pure
purves » curves
purse » pursue, pure, perse
curse » course, curso, cursa
curses » courses, cursos, cursas, curves, cursus
propose » proposed, propone, proponen
courses » course

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 ( ((((pures OR purves) OR (purse OR curse)) OR propose) OR ((curses OR courses) OR curvas)) practitioner ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( nurses practitioner ) OR ( ((((pures OR purves) OR (purse OR curse)) OR propose) OR ((curses OR courses) OR curvas)) practitioner ))".
• Adding a wildcard symbol may retrieve word variants: (( nurses practitioner ) OR ( ((((pures OR purves) OR (purse OR curse)) OR propose) OR ((curses OR courses) OR curvas)) practitioner ))*.