Talvez deva tentar algumas variações de ortografia:
national computer » national committee (Expandir a Pesquisa), international computer (Expandir a Pesquisa), personal computer (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
compr can » comp can (Expandir a Pesquisa), compared can (Expandir a Pesquisa)
nat clamp » dnan clamp (Expandir a Pesquisa), a clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j natali (Expandir a Pesquisa)
a netw » a neto (Expandir a Pesquisa), a neta (Expandir a Pesquisa), a netb (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (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 compr can netw ) or ( j nat clamp a netw ))) or ( _ national computer can now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl compr can netw ) OR ( j nat clamp a netw ))) OR ( _ national computer can now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl compr can netw ) or ( j nat clamp a netw ))) or ( _ national computer can now ))*.