Perhaps you should try some spelling variations:
perse » pese, verse, pere
perseo » peseo, verseo, pereo
persello » pesello, versello, perello
persa » persas, perla
persao » persaso, perlao, persano, persas, versao
versa » versao, verso, verse
peso » pero, paso, eso
vera » vega, ver, sera
cursa » cursan, curso, cura

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nurses OR (((perse OR (persa OR versa)) OR ((((perseo OR persao) OR peso) OR (personas OR (vera OR era))) OR persello)) OR cursa)) OR nurkse) practitioners~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nurses OR (((perse OR (persa OR versa)) OR ((((perseo OR persao) OR peso) OR (personas OR (vera OR era))) OR persello)) OR cursa)) OR nurkse) practitioners".
• Adding a wildcard symbol may retrieve word variants: ((nurses OR (((perse OR (persa OR versa)) OR ((((perseo OR persao) OR peso) OR (personas OR (vera OR era))) OR persello)) OR cursa)) OR nurkse) practitioners*.