Talvez deva tentar algumas variações de ortografia:
norway comparison » airway comparison (Expandir a Pesquisa), airways comparison (Expandir a Pesquisa), way comparison (Expandir a Pesquisa)
comparison case » comparison based (Expandir a Pesquisa), comparison bases (Expandir a Pesquisa), comparison a (Expandir a Pesquisa)
computer case » computer based (Expandir a Pesquisa), computer age (Expandir a Pesquisa), computer code (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), unit computer (Expandir a Pesquisa)
narr clamp » arm clamp (Expandir a Pesquisa)
case netw » case new (Expandir a Pesquisa), case note (Expandir a Pesquisa), case near (Expandir a Pesquisa)
j norway » _ norway (Expandir a Pesquisa), a norway (Expandir a Pesquisa), 3 norway (Expandir a Pesquisa)
clamp ar » clamp a (Expandir a Pesquisa), clamp pcr (Expandir a Pesquisa), clamp _ (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
j narr » l narr (Expandir a Pesquisa), j nair (Expandir a Pesquisa), j nasr (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), j nay (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j norway comparison case netw ) OR ( j narr clamp ar netw ))) OR ( j nat computer case now ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j norway comparison case netw ) or ( j narr clamp ar netw ))) or ( j nat computer case now ))*.