Perhaps you should try some spelling variations:
"occasional prayers; occasional verse" » "occasional poems; occasional verse", "occasional writer; occasional verse"
"occasional notess; occasional notes" » "occasional notices; occasional notes", "occasional poems; occasional notes", "occasion notes; occasional notes"
"occasional verses; occasional verse" » "occasional sermons; occasional verse", "occasional letters; occasional verse", "occasional letter; occasional verse"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("occasional notess; occasional notes") OR ((("occasional verses; occasional verse") OR ("occasional prayers; occasional verse")))).
• Removing quotes may allow a broader search: (( occasional notess; occasional notes ) or ((( occasional verses; occasional verse ) or ( occasional prayers; occasional verse )))).
• Adding a wildcard symbol may retrieve word variants: (("occasional notess; occasional notes") or ((("occasional verses; occasional verse") or ("occasional prayers; occasional verse"))))*.