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 writers, occasional writer" » "occasional drivers, occasional writer", "occasional writings, occasional writer", "occasional letters, occasional writer", "occasional notess, occasional notes", "occasions writtens, occasions written"
"occasional papers, occasional verse" » "occasional paper, occasional verse", "occasional poems, occasional verse", "occasional notes, occasional verse"

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