Perhaps you should try some spelling variations:
"computer added design" » "computer aided design", "computer guided design", "computer age design", "computer added designs", "computer adder design"
"computer aide design" » "computer aided design", "computer aid design", "computed aided design", "computer ade design"
"computer aids design" » "computer aid design", "computer aided design", "computer als design", "computer acids design"

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