Perhaps you should try some spelling variations:
specialist periodical » specialized periodicals, socialism periodicals, specialist medical
periodical vendors » periodical error
periodical returns » periodical sets, period returns
periodical record » periodicals before, medical record, periodical work

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 vendors ) OR ( Specialist periodical record ))) OR ( specialist periodical returns )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( Specialist periodical vendors ) OR ( Specialist periodical record ))) or ( specialist periodical returns ))".
• Adding a wildcard symbol may retrieve word variants: (((( Specialist periodical vendors ) OR ( Specialist periodical record ))) or ( specialist periodical returns ))*.