Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
maple computer » apple computer (Expandir a Pesquisa), simple computer (Expandir a Pesquisa), mobile computer (Expandir a Pesquisa)
nat compare » rat compared (Expandir a Pesquisa), rate compare (Expandir a Pesquisa), cat compared (Expandir a Pesquisa)
nair clamp » nair alap (Expandir a Pesquisa)
clamp cum » clamp m (Expandir a Pesquisa), clamp can (Expandir a Pesquisa), clamp em (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
cum netw » um neto (Expandir a Pesquisa), mum net (Expandir a Pesquisa)
j maple » _ maple (Expandir a Pesquisa)
j nair » j narr (Expandir a Pesquisa), j nasr (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.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat compare _ netw ) OR ( j nair clamp cum netw ))) OR ( j maple computer based now ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat compare _ netw ) or ( j nair clamp cum netw ))) or ( j maple computer based now ))*.