Talvez deva tentar algumas variações de ortografia:
natl computers » small computers (Expandir a Pesquisa), units computers (Expandir a Pesquisa), panel computers (Expandir a Pesquisa)
compared cases » compared case (Expandir a Pesquisa), compares bases (Expandir a Pesquisa), compared values (Expandir a Pesquisa)
computer code » computer model (Expandir a Pesquisa), computer models (Expandir a Pesquisa), computer crime (Expandir a Pesquisa)
computers a » computers _ (Expandir a Pesquisa)
il computer » dal computer (Expandir a Pesquisa), vhdl computer (Expandir a Pesquisa), acm computer (Expandir a Pesquisa)
ct compared » test compared (Expandir a Pesquisa)
cases now » cases new (Expandir a Pesquisa), cases non (Expandir a Pesquisa), case now (Expandir a Pesquisa)
code now » code new (Expandir a Pesquisa), code noir (Expandir a Pesquisa), code net (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
a now » a nowe (Expandir a Pesquisa), a new (Expandir a Pesquisa), a non (Expandir a Pesquisa)
e il » _ il (Expandir a Pesquisa), e l (Expandir a Pesquisa), e i (Expandir a Pesquisa)
j ct » j c (Expandir a Pesquisa), j st (Expandir a Pesquisa), j et (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: (((( j natl computers a now ) or ( e il computer code now ))) or ( j ct compared cases now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl computers a now ) OR ( e il computer code now ))) OR ( j ct compared cases now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl computers a now ) or ( e il computer code now ))) or ( j ct compared cases now ))*.