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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"occasional prayers; occasional letter\") OR (\"occasional notess; occasional notes\"))".
• Removing quotes may allow a broader search: (( occasional prayers; occasional letter ) OR ( occasional notess; occasional notes )).
• Adding a wildcard symbol may retrieve word variants: (("occasional prayers; occasional letter") OR ("occasional notess; occasional notes"))*.