Perhaps you should try some spelling variations:
computer cases » computer case (Expand Search), computer classes (Expand Search), computer caries (Expand Search)
del computer » dal computer (Expand Search), delta computer (Expand Search), model computer (Expand Search)
narr comp » barr com (Expand Search), parr comb (Expand Search)
dna clamp » a clamp (Expand Search)
clamp cum » clamp m (Expand Search), clamp can (Expand Search), clamp em (Expand Search)
cum newts » can newts (Expand Search)
comp can » camp can (Expand Search), chimp can (Expand Search), clamp can (Expand Search)
j narr » l narr (Expand Search), j nair (Expand Search), j nare (Expand Search)
1 dna » _ dna (Expand Search), a dna (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( j narr comp can new ) or ( 1 dna clamp cum newts ))) or ( j del computer cases new ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( j narr comp can new ) OR ( 1 dna clamp cum newts ))) OR ( j del computer cases new )).
• Adding a wildcard symbol may retrieve word variants: (((( j narr comp can new ) or ( 1 dna clamp cum newts ))) or ( j del computer cases new ))*.