Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
nat computers » what computers (Expandir a Pesquisa), iet computers (Expandir a Pesquisa), can computers (Expandir a Pesquisa)
fat companies » meat companies (Expandir a Pesquisa), let companies (Expandir a Pesquisa), great companies (Expandir a Pesquisa)
computers a » computers _ (Expandir a Pesquisa)
companies a » companies _ (Expandir a Pesquisa)
2 computer » _ computer (Expandir a Pesquisa), a computer (Expandir a Pesquisa), 3d computer (Expandir a Pesquisa)
e nat » e nata (Expandir a Pesquisa), e nao (Expandir a Pesquisa), e nas (Expandir a Pesquisa)
a now » a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa), a nos (Expandir a Pesquisa)
j fat » j fath (Expandir a Pesquisa), _ fat (Expandir a Pesquisa), a fat (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": "(((( e nat computers a now ) OR ( 3 2 computer based non ))) OR ( j fat companies a new ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( e nat computers a now ) OR ( 3 2 computer based non ))) OR ( j fat companies a new ))*.