Perhaps you should try some spelling variations:
occasional letter » occasional writer, occasional verse
2f number » 21 number, 23 number, 29 number
22 number » 12 numbers, 2.4 number, a number
2 number » a 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: %((22((occasional letter) OR (occasional notes))) OR (((occasional letter) OR (occasional notes)))) %((((2f number) OR (22 number))) OR (2 number)) 1%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22((occasional letter) or (occasional notes))) or (((occasional letter) or (occasional notes)))) %((((2f number) OR (22 number))) or (2 number)) 1%22".
• Adding a wildcard symbol may retrieve word variants: %((22((occasional letter) or (occasional notes))) or (((occasional letter) or (occasional notes)))) %((((2f number) OR (22 number))) or (2 number)) 1%22*.