Perhaps you should try some spelling variations:
occasional prayers » occasional poems, occasional writer
occasional letter » occasional writer, occasional notes
occasional paper » occasional papers, occasional writer, occasional notes

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 prayers) OR (occasional verse)), ((occasional paper) OR (occasional letter)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((occasional prayers) or (occasional verse)), ((occasional paper) OR (occasional letter))".
• Adding a wildcard symbol may retrieve word variants: ((occasional prayers) or (occasional verse)), ((occasional paper) OR (occasional letter))*.