Perhaps you should try some spelling variations:
computer based » computer aided (Expand Search)
del computer » dal computer (Expand Search), delta computer (Expand Search), model computer (Expand Search)
compr can » comp can (Expand Search), computer can (Expand Search), compared can (Expand Search)
sm newton » sam newton (Expand Search), m newton (Expand Search), em newton (Expand Search)
based now » based snow (Expand Search), based non (Expand Search), based no2 (Expand Search)
can near » can never (Expand Search), can new (Expand Search)
clamp sm » clamp em (Expand Search), clamp cum (Expand Search), clamp _ (Expand Search)
a clamp » _ clamp (Expand Search), a claims (Expand Search)
j natl » j nail (Expand Search), _ natl (Expand Search), j nat (Expand Search)
j del » y del (Expand Search), m del (Expand Search), _ del (Expand Search)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

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: (((( j natl compr can near ) OR ( j a clamp sm newton ))) OR ( j del computer based now ))~.
• Adding a wildcard symbol may retrieve word variants: (((( j natl compr can near ) or ( j a clamp sm newton ))) or ( j del computer based now ))*.