Talvez deva tentar algumas variações de ortografia:
comparing case » comparing cancer (Expandir a Pesquisa), compelling case (Expandir a Pesquisa), comparing climate (Expandir a Pesquisa)
can computers » can computer (Expandir a Pesquisa), than computers (Expandir a Pesquisa), can computed (Expandir a Pesquisa)
natl computer » dal computer (Expandir a Pesquisa), apl computer (Expandir a Pesquisa), call computer (Expandir a Pesquisa)
acl comparing » al comparing (Expandir a Pesquisa), all comparing (Expandir a Pesquisa), hcc comparing (Expandir a Pesquisa)
computer age » computer image (Expandir a Pesquisa), computer a (Expandir a Pesquisa), computer aided (Expandir a Pesquisa)
age note » age denote (Expandir a Pesquisa), usage note (Expandir a Pesquisa), case note (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
3 natl » 3 nacl (Expandir a Pesquisa), 3 nail (Expandir a Pesquisa), _ natl (Expandir a Pesquisa)
j can » j cano (Expandir a Pesquisa), j cant (Expandir a Pesquisa), _ can (Expandir a Pesquisa)
j acl » _ acl (Expandir a Pesquisa), j adl (Expandir a Pesquisa), 8 acl (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( j can computers _ now ) or ( 3 natl computer age note ))) or ( j acl comparing case now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j can computers _ now ) OR ( 3 natl computer age note ))) OR ( j acl comparing case now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j can computers _ now ) or ( 3 natl computer age note ))) or ( j acl comparing case now ))*.