Perhaps you should try some spelling variations:
"specialized periodicals reports" » "socialism periodicals reports", "specialized medical reports", "specialized periodical returns", "specialized periodicals part", "specialized periodic report"
"specialist speciesical returns" » "specialist species returns", "specialist periodical returns", "specialist specific returns"
"specialized protocols reports" » "specified protocols reports", "specialized tools reports", "special protocols reports", "specialized protocols ports", "specialized protocols records", "specialized protocols reporting"
"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 ("specialized protocols reports"))) OR ("special periodical reports"))) OR ((("specialist speciesical returns") OR ("specialist period returns")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"specialized periodicals reports\") OR (\"specialized protocols reports\"))) or (\"special periodical reports\"))) or (((\"specialist speciesical returns\") or (\"specialist period returns\"))))".
• Removing quotes may allow a broader search: (((((( specialized periodicals reports ) OR ( specialized protocols reports ))) or ( special periodical reports ))) or ((( specialist speciesical returns ) or ( specialist period returns )))).
• Adding a wildcard symbol may retrieve word variants: (((((("specialized periodicals reports") OR ("specialized protocols reports"))) or ("special periodical reports"))) or ((("specialist speciesical returns") or ("specialist period returns"))))*.