Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
best computer » iet computer (Expandir a Pesquisa), cost computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa)
nat compared » rat compared (Expandir a Pesquisa), cat compared (Expandir a Pesquisa), fat compared (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
computer a » computer _ (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
based new » based next (Expandir a Pesquisa), based near (Expandir a Pesquisa), based n (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: (( _ nat compared can newts ) or ((( _ nat computer based new ) or ( j best computer a new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ nat compared can newts ) OR ((( _ nat computer based new ) OR ( j best computer a new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ nat compared can newts ) or ((( _ nat computer based new ) or ( j best computer a new ))))*.