Perhaps you should try some spelling variations:
"occasional papers, occasional prayers" » "occasional papers, occasional poems", "occasional paper, occasional prayers", "occasional poems, occasional prayers", "occasional verse, occasional prayers"
"occasional writers, occasional writer" » "occasional drivers, occasional writer", "occasional writings, occasional writer", "occasional letters, occasional writer", "occasional notess, occasional notes"
"occasions writtens, occasions written" » "occasion written, occasions written", "occasions fitted, occasions written", "occasionally written, occasions written"

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 papers, occasional prayers") OR ((("occasional writers, occasional writer") OR ("occasions writtens, occasions written"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"occasional papers, occasional prayers\") or (((\"occasional writers, occasional writer\") OR (\"occasions writtens, occasions written\"))))*".
• Removing quotes may allow a broader search: (( occasional papers, occasional prayers ) or ((( occasional writers, occasional writer ) OR ( occasions writtens, occasions written ))))*.