Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
nacl compared » acl compared (Expandir a Pesquisa), small compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
del computer » dal computer (Expandir a Pesquisa), delta computer (Expandir a Pesquisa), model computer (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
de units » de unite (Expandir a Pesquisa), de unioes (Expandir a Pesquisa), de united (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
a del » m del (Expandir a Pesquisa), _ del (Expandir a Pesquisa)
a non » _ non (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: (((( a del computer based now ) or ( de units computers can now ))) or ( 3 nacl compared a non ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( a del computer based now ) OR ( de units computers can now ))) OR ( 3 nacl compared a non )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a del computer based now ) or ( de units computers can now ))) or ( 3 nacl compared a non ))*.