Perhaps you should try some spelling variations:
"specialized periodicals reports" » "socialism periodicals reports", "specialized medical reports", "specialized protocols reports", "specialized periodical returns", "specialized periodicals part", "specialized periodic report"
"specialist speciesical returns" » "specialist species returns", "specialist periodical returns"
"specialist specific returns" » "specialist species returns", "specialty specific returns", "species specific returns", "specialist specific return", "specialist specific regions", "specialist specific results"
"special periodical reports" » "special pedagogical reports", "serials periodicals reports", "special medical reports", "special periodical returns", "special periodic report", "special periodical record"
"specialist period returns" » "socialist period returns", "special period returns", "specialist species returns", "specialist periodical returns"

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