Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
companies case » companies based (Expandir a Pesquisa), companies a (Expandir a Pesquisa), companies act (Expandir a Pesquisa)
rat companies » great companies (Expandir a Pesquisa), ratna companies (Expandir a Pesquisa), meat companies (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
ct computer » cat computer (Expandir a Pesquisa), ut computer (Expandir a Pesquisa), ct computed (Expandir a Pesquisa)
case netw » case net (Expandir a Pesquisa), case new (Expandir a Pesquisa), case note (Expandir a Pesquisa)
based new » based next (Expandir a Pesquisa), based near (Expandir a Pesquisa), based n (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), a nat (Expandir a Pesquisa)
e ct » e ict (Expandir a Pesquisa), e ect (Expandir a Pesquisa), e act (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (( _ rat companies case netw ) or ((( e ct computer based new ) or ( j nat computer _ new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ rat companies case netw ) OR ((( e ct computer based new ) OR ( j nat computer _ new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ rat companies case netw ) or ((( e ct computer based new ) or ( j nat computer _ new ))))*.