Perhaps you should try some spelling variations:
"sociology and learning practices services" » "sociology and learning processes services", "sociology and learning practice services", "sociology and learning practice service", "sociology and learning practical service", "sociology and learning practices overviews", "sociology and learning practices sections"
"sociology and learning practices sections" » "sociology and learning processes sections", "sociology and learning practices section", "sociology and learning practice section", "sociology and learning practices questions"
"sociology and nursing practices service" » "sociology and nursing practice service", "sociology and nursing practical service", "sociology and farming practices service", "sociology and nursing practices overview", "sociology and nursing practices section"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("sociology and nursing practices service") OR ((("sociology and learning practices services") OR ("sociology and learning practices sections")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"sociology and nursing practices service\") or (((\"sociology and learning practices services\") OR (\"sociology and learning practices sections\"))))".
• Removing quotes may allow a broader search: (( sociology and nursing practices service ) or ((( sociology and learning practices services ) OR ( sociology and learning practices sections )))).
• Adding a wildcard symbol may retrieve word variants: (("sociology and nursing practices service") or ((("sociology and learning practices services") OR ("sociology and learning practices sections"))))*.