Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
nacl compared » acl compared (Expandir a Pesquisa), small compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
deml computer » dem computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa), uml computer (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
claims can » claims a (Expandir a Pesquisa), claims may (Expandir a Pesquisa)
based snow » based snp (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa)
a claims » _ claims (Expandir a Pesquisa)
j nacl » _ nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa), a nacl (Expandir a Pesquisa)
j deml » c deml (Expandir a Pesquisa), j dell (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 nacl compared can near ) OR ( j a claims can new ))) OR ( j deml computer based snow ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nacl compared can near ) OR ( j a claims can new ))) OR ( j deml computer based snow ))*.