Talvez deva tentar algumas variações de ortografia:
computer model » computer modeling (Expandir a Pesquisa), computer modelling (Expandir a Pesquisa)
nacl compared » acl compared (Expandir a Pesquisa), small compared (Expandir a Pesquisa), gel compared (Expandir a Pesquisa)
nail computer » daily computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa), il computer (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
clamp can » clamp a (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
model now » model new (Expandir a Pesquisa), model non (Expandir a Pesquisa), models know (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
a clamp » dna clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)
j nail » j nair (Expandir a Pesquisa), j naik (Expandir a Pesquisa), j naim (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 clamp can newts ))) OR ( j nail computer model now ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nacl compared can near ) OR ( j a clamp can newts ))) OR ( j nail computer model now ))*.