Perhaps you should try some spelling variations:
occasional letters » occasional prayers, occasional papers
occasional writer » occasions written
occasional letter » occasional verse
2f number » 2 number, 22 number, 23 number
21 number » 2 number, 22 number, 11 number
1 number » 1 numbers, 2 number, 3 number

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) OR (((occasional writer) OR (occasional notes))))) OR (occasional letter)) %((2f number) OR (((21 number) OR (1 number)))) 1%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((occasional letters) or (((occasional writer) or (occasional notes))))) or (occasional letter)) %((2f number) or (((21 number) OR (1 number)))) 1%22".
• Adding a wildcard symbol may retrieve word variants: %((((occasional letters) or (((occasional writer) or (occasional notes))))) or (occasional letter)) %((2f number) or (((21 number) OR (1 number)))) 1%22*.