Perhaps you should try some spelling variations:
computer code » computer model (Expand Search), computer models (Expand Search), computer crime (Expand Search)
cao computer » carlo computer (Expand Search), cogo computer (Expand Search), a computer (Expand Search)
canc netw » canc lett (Expand Search)
code netw » code net (Expand Search), code new (Expand Search), code nec2 (Expand Search)
nat comp » nat comm (Expand Search), et comp (Expand Search), nat cov (Expand Search)
comp can » camp can (Expand Search), chimp can (Expand Search), clamp can (Expand Search)
can netw » can new (Expand Search), can net (Expand Search), can newts (Expand Search)
da comp » da como (Expand Search), da com (Expand Search), da compra (Expand Search)
j nat » j nart (Expand Search), _ nat (Expand Search), a nat (Expand Search)
j cao » _ cao (Expand Search), y cao (Expand Search), o cao (Expand Search)
j da » j a (Expand Search), j d (Expand Search), j de (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 nat comp canc netw ) or ((( j cao computer code netw ) or ( j da comp can netw ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j nat comp canc netw ) OR ((( j cao computer code netw ) OR ( j da comp can netw )))).
• Adding a wildcard symbol may retrieve word variants: (( j nat comp canc netw ) or ((( j cao computer code netw ) or ( j da comp can netw ))))*.