Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (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)
apl computer » maple computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa), acm computer (Expandir a Pesquisa)
narr clamp » arm clamp (Expandir a Pesquisa)
based next » based nested (Expandir a Pesquisa)
clamp ar » clamp a (Expandir a Pesquisa), clamp pcr (Expandir a Pesquisa), clamp _ (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (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)
j apl » j appl (Expandir a Pesquisa), _ apl (Expandir a Pesquisa), j adl (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 nat compared can now ) OR ( j narr clamp ar netw ))) OR ( j apl computer based next ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat compared can now ) OR ( j narr clamp ar netw ))) OR ( j apl computer based next ))*.