Talvez deva tentar algumas variações de ortografia:
nat2 computer » cat computer (Expandir a Pesquisa), nature computer (Expandir a Pesquisa), a computer (Expandir a Pesquisa)
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer can (Expandir a Pesquisa)
natl compared » nacl compared (Expandir a Pesquisa), nail compared (Expandir a Pesquisa), acl compared (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
case netw » case new (Expandir a Pesquisa), case note (Expandir a Pesquisa), case near (Expandir a Pesquisa)
can netw » can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa), can now (Expandir a Pesquisa)
nat comp » et comp (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
_ nat » _ net (Expandir a Pesquisa), _ nad (Expandir a Pesquisa), _ nab (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: (((( 2 nat2 computer case netw ) or ( j natl compared can netw ))) or ( _ nat comp can new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( 2 nat2 computer case netw ) OR ( j natl compared can netw ))) OR ( _ nat comp can new )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 2 nat2 computer case netw ) or ( j natl compared can netw ))) or ( _ nat comp can new ))*.