Talvez deva tentar algumas variações de ortografia:
natl comparing » al comparing (Expandir a Pesquisa), all comparing (Expandir a Pesquisa), babel comparing (Expandir a Pesquisa)
comparing case » comparing cancer (Expandir a Pesquisa), compelling case (Expandir a Pesquisa), comparison case (Expandir a Pesquisa)
call computer » small computer (Expandir a Pesquisa), scale computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
natl comp » al comp (Expandir a Pesquisa), natalia comp (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), cao ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
j natl » j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa), j natali (Expandir a Pesquisa)
j call » j calle (Expandir a Pesquisa), j calls (Expandir a Pesquisa), j calu (Expandir a Pesquisa)
_ natl » _ natal (Expandir a Pesquisa), _ nat'l (Expandir a Pesquisa), _ nato (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 natl comp can ngoc ) or ( j call computer can ngoc ))) or ( _ natl comparing case now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl comp can ngoc ) OR ( j call computer can ngoc ))) OR ( _ natl comparing case now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl comp can ngoc ) or ( j call computer can ngoc ))) or ( _ natl comparing case now ))*.