Talvez deva tentar algumas variações de ortografia:
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer crime (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer a (Expandir a Pesquisa), computer code (Expandir a Pesquisa)
l computer » il computer (Expandir a Pesquisa), al computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa)
case netw » case new (Expandir a Pesquisa), case note (Expandir a Pesquisa), case near (Expandir a Pesquisa)
nat compr » la compr (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
cac netw » soc netw (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), e nat (Expandir a Pesquisa), j nay (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( _ nat computer case netw ) OR ( j nat compr cac netw ))) OR ( j l computer can newts ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( _ nat computer case netw ) OR ( j nat compr cac netw ))) OR ( j l computer can newts ))*.