Perhaps you should try some spelling variations:
specialist periodical » specialized periodicals, specialist neurological
socialism periodicals » alcoholism periodicals, society periodicals, socialism political
"specialist medical reports" » "special medical reports", "specific medical reports", "specialist medical records", "specialist medical record", "specialist clinical reports"
"specialist seminar reports" » "special seminar reports", "specialist settings reports"

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) or (socialism periodicals)) reports") OR ((("specialist medical reports") OR ("specialist seminar reports")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"((specialist periodical) or (socialism periodicals)) reports\") or (((\"specialist medical reports\") OR (\"specialist seminar reports\"))))".
• Removing quotes may allow a broader search: (( ((specialist periodical) or (socialism periodicals)) reports ) or ((( specialist medical reports ) OR ( specialist seminar reports )))).
• Adding a wildcard symbol may retrieve word variants: (("((specialist periodical) or (socialism periodicals)) reports") or ((("specialist medical reports") OR ("specialist seminar reports"))))*.