Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
combined can » combined case (Expandir a Pesquisa), combined care (Expandir a Pesquisa), combined c (Expandir a Pesquisa)
based new » based next (Expandir a Pesquisa), based near (Expandir a Pesquisa), based n (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
a combes » a coombes (Expandir a Pesquisa), w combes (Expandir a Pesquisa), a combs (Expandir a Pesquisa)
combes a » coombes a (Expandir a Pesquisa), combes b (Expandir a Pesquisa), combes d (Expandir a Pesquisa)
a netb » a neto (Expandir a Pesquisa), _ netb (Expandir a Pesquisa), a neta (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j a combined can netw ) OR ( j a combes a netb ))) OR ( j nat computer based new ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j a combined can netw ) or ( j a combes a netb ))) or ( j nat computer based new ))*.