Perhaps you should try some spelling variations:
"Computer-added designs" » "Computer-aided designs", "Computer-adder designs", "Computer-added designed", "Computer-added designeds", "Computer-adder designss"
"Computer-added design" » "Computer-adder design", "Computer-added designed", "Computer-adder designs"
"computer-aided design" » "computer-aimed design"

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: (("computer-aided design") OR ((("Computer-added design") OR ("Computer-added designs")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"computer-aided design\") or (((\"Computer-added design\") OR (\"Computer-added designs\"))))".
• Removing quotes may allow a broader search: (( computer-aided design ) or ((( Computer-added design ) OR ( Computer-added designs )))).
• Adding a wildcard symbol may retrieve word variants: (("computer-aided design") or ((("Computer-added design") OR ("Computer-added designs"))))*.