Perhaps you should try some spelling variations:
specialized periodicals » specialized medical, specialized protocols
specialist periodical » specialist medical, specialist neurological
socialism periodicals » alcoholism periodicals, society periodicals, socialism political

Try widening your search to All Fields.

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: (("((((specialist periodical) OR (specialized periodicals))) or (socialism periodicals)) reports") OR ("((((specialist periodical) OR (specialized periodicals))) or (socialism periodicals)) returns")).
• Removing quotes may allow a broader search: (( ((((specialist periodical) OR (specialized periodicals))) or (socialism periodicals)) reports ) or ( ((((specialist periodical) OR (specialized periodicals))) or (socialism periodicals)) returns )).
• Adding a wildcard symbol may retrieve word variants: (("((((specialist periodical) OR (specialized periodicals))) or (socialism periodicals)) reports") or ("((((specialist periodical) OR (specialized periodicals))) or (socialism periodicals)) returns"))*.