Talvez deva tentar algumas variações de ortografia:
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer can (Expandir a Pesquisa)
ai computer » api computer (Expandir a Pesquisa), ii computer (Expandir a Pesquisa), i computer (Expandir a Pesquisa)
has never » a never (Expandir a Pesquisa)
camp has » camp case (Expandir a Pesquisa), camp chad (Expandir a Pesquisa), camp have (Expandir a Pesquisa)
a claims » _ claims (Expandir a Pesquisa)
claims a » claims _ (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
cl camp » el camp (Expandir a Pesquisa), cell camp (Expandir a Pesquisa), del camp (Expandir a Pesquisa)
j cl » j c (Expandir a Pesquisa), j l (Expandir a Pesquisa), j al (Expandir a Pesquisa)
j ai » j i (Expandir a Pesquisa), j li (Expandir a Pesquisa), j al (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 cl camp has never ) OR ( j a claims a new ))) OR ( j ai computer case now ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j cl camp has never ) OR ( j a claims a new ))) OR ( j ai computer case now ))*.