Talvez deva tentar algumas variações de ortografia:
norway compare » norway compared (Expandir a Pesquisa), norway comparing (Expandir a Pesquisa), norway comparative (Expandir a Pesquisa)
computer based » computer aided (Expandir a Pesquisa)
natl computer » dal computer (Expandir a Pesquisa), apl computer (Expandir a Pesquisa), call computer (Expandir a Pesquisa)
nair clamp » nair alap (Expandir a Pesquisa)
compare a » compare _ (Expandir a Pesquisa)
clamp dan » clamp can (Expandir a Pesquisa), clamp drain (Expandir a Pesquisa), clamp data (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
j norway » _ norway (Expandir a Pesquisa), a norway (Expandir a Pesquisa), 1 norway (Expandir a Pesquisa)
dan net » dan neal (Expandir a Pesquisa)
j nair » b nair (Expandir a Pesquisa), j narr (Expandir a Pesquisa), j nasr (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
a net » a new (Expandir a Pesquisa), _ net (Expandir a Pesquisa), u net (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j norway compare a net ) OR ( j nair clamp dan net ))) OR ( j natl computer based now ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j norway compare a net ) OR ( j nair clamp dan net ))) OR ( j natl computer based now ))*.