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

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("occasional letters; occasional letter") OR ((("occasional verses; occasional verse") OR ("occasional sermons; occasional verse"))))) OR ("occasional poems; occasional letter")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"occasional letters; occasional letter\") or (((\"occasional verses; occasional verse\") OR (\"occasional sermons; occasional verse\"))))) or (\"occasional poems; occasional letter\"))".
• Removing quotes may allow a broader search: (((( occasional letters; occasional letter ) or ((( occasional verses; occasional verse ) OR ( occasional sermons; occasional verse ))))) or ( occasional poems; occasional letter )).
• Adding a wildcard symbol may retrieve word variants: (((("occasional letters; occasional letter") or ((("occasional verses; occasional verse") OR ("occasional sermons; occasional verse"))))) or ("occasional poems; occasional letter"))*.