Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
nac computer » ugc computer (Expandir a Pesquisa), c computer (Expandir a Pesquisa), cnc computer (Expandir a Pesquisa)
comet can » comes can (Expandir a Pesquisa), comet jean (Expandir a Pesquisa), ahmet can (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
clamp em » clamp m (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa), clamp _ (Expandir a Pesquisa)
a clamp » c clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
3 nac » 3 nacl (Expandir a Pesquisa), _ nac (Expandir a Pesquisa), a nac (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 comet can near ) or ( j a clamp em new ))) or ( 3 nac computer based now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl comet can near ) OR ( j a clamp em new ))) OR ( 3 nac computer based now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl comet can near ) or ( j a clamp em new ))) or ( 3 nac computer based now ))*.