Perhaps you should try some spelling variations:
"optical disks -- nations publications" » "optical disks -- asian publications", "optical disks -- asia publications", "optical disks -- nations relations"
"optical disks -- library publications" » "optical disks -- star publications"
"optical disks -- irwin publications" » "optical disks -- asia publications", "optical disks -- asian publications"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("optical disks -- library applications") or ("optical risks -- library applications"))) or ((("optical disks -- library publications") or ((("optical disks -- irwin publications") OR ("optical disks -- nations publications"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("optical disks -- library applications") OR ("optical risks -- library applications"))) OR ((("optical disks -- library publications") OR ((("optical disks -- irwin publications") OR ("optical disks -- nations publications")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"optical disks -- library applications\") or (\"optical risks -- library applications\"))) or (((\"optical disks -- library publications\") or (((\"optical disks -- irwin publications\") OR (\"optical disks -- nations publications\"))))))".
• Removing quotes may allow a broader search: (((( optical disks -- library applications ) or ( optical risks -- library applications ))) or ((( optical disks -- library publications ) or ((( optical disks -- irwin publications ) OR ( optical disks -- nations publications )))))).
• Adding a wildcard symbol may retrieve word variants: (((("optical disks -- library applications") or ("optical risks -- library applications"))) or ((("optical disks -- library publications") or ((("optical disks -- irwin publications") OR ("optical disks -- nations publications"))))))*.

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