Perhaps you should try some spelling variations:
"specialist periodical reports" » "specialized periodicals reports", "socialism periodicals reports", "specialist medical reports", "specialist periodical record", "specialist periodical works"
"Specialist periodical returns" » "Specialist period returns"
"Specialist periodical sets" » "Specialist periodical set"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("specialist periodical reports") OR ((("Specialist periodical returns") OR ("Specialist periodical sets")))).
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• Removing quotes may allow a broader search: (( specialist periodical reports ) or ((( Specialist periodical returns ) OR ( Specialist periodical sets )))).
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