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 computers » what computers (Expandir a Pesquisa), iet computers (Expandir a Pesquisa), can computers (Expandir a Pesquisa)
let companies » led companies (Expandir a Pesquisa), lead companies (Expandir a Pesquisa), best companies (Expandir a Pesquisa)
aix computer » a computer (Expandir a Pesquisa), udx computer (Expandir a Pesquisa), tex computer (Expandir a Pesquisa)
computers a » computers _ (Expandir a Pesquisa)
companies a » companies _ (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
6j let » 60 let (Expandir a Pesquisa), 65 let (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)
3 aix » _ aix (Expandir a Pesquisa), d aix (Expandir a Pesquisa), 3 atx (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: (((( _ nat computers a now ) or ( 3 aix computer case now ))) or ( 6j let companies a now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( _ nat computers a now ) OR ( 3 aix computer case now ))) OR ( 6j let companies a now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( _ nat computers a now ) or ( 3 aix computer case now ))) or ( 6j let companies a now ))*.