Perhaps you should try some spelling variations:
"specialist periodical reports" » "specialized periodicals reports", "socialism periodicals reports", "specialist medical reports", "specialist periodic report", "specialist periodical record", "socialist periodical reports", "special periodical reports", "specialist speciesical reports"
"specialist periodical returns" » "specialized periodicals returns", "socialism periodicals returns", "specialist medical returns", "specialist periodical sets", "socialist periodical returns", "special periodical returns", "specialist speciesical returns"
"serials periodicals reports" » "socialism periodicals reports", "reviews periodicals reports", "medical periodicals reports", "serials periodicals part", "serials periodic report", "serials periodical record"
"special periodical reports" » "special periodic report", "special periodical record", "special medical reports", "special pedagogical reports", "specialized periodicals reports"
"specialist period returns" » "socialist period returns", "special period returns", "specialist species returns"

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