Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
nacl computer » dal computer (Expandir a Pesquisa), apl computer (Expandir a Pesquisa), call computer (Expandir a Pesquisa)
unit computer » units computers (Expandir a Pesquisa), tunis computer (Expandir a Pesquisa), ut computer (Expandir a Pesquisa)
acl compared » nacl compared (Expandir a Pesquisa), al compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
computer a » computer _ (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
a unit » a united (Expandir a Pesquisa)
_ acl » _ act (Expandir a Pesquisa), _ ace (Expandir a Pesquisa)
a now » a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa), a nos (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: (((( 3.5 nacl computer based now ) or ( a unit computer a new ))) or ( _ acl compared a now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( 3.5 nacl computer based now ) OR ( a unit computer a new ))) OR ( _ acl compared a now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 3.5 nacl computer based now ) or ( a unit computer a new ))) or ( _ acl compared a now ))*.