Perhaps you should try some spelling variations:
"occasional papers, occasional prayers" » "occasional papers, occasional poems", "occasional paper, occasional prayers", "occasional poems, occasional prayers", "occasional notes, occasional prayers"
"occasional verse, occasional prayers" » "occasional verse, occasional poems"
"occasional writings, occasional writer" » "occasional writings, occasional notes", "occasional writings, occasions written"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("occasional papers, occasional prayers") OR ("occasional verse, occasional prayers"))) OR ("occasional writings, occasional writer")).
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