Talvez deva tentar algumas variações de ortografia:
nacl comparing » al comparing (Expandir a Pesquisa), all comparing (Expandir a Pesquisa), rachel comparing (Expandir a Pesquisa)
comparing case » comparing cancer (Expandir a Pesquisa), compelling case (Expandir a Pesquisa), comparing climate (Expandir a Pesquisa)
natl compared » nacl compared (Expandir a Pesquisa), nail compared (Expandir a Pesquisa), acl compared (Expandir a Pesquisa)
ago comparing » go comparing (Expandir a Pesquisa), do comparing (Expandir a Pesquisa), bag comparing (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), a nacl (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)
_ ago » _ ago2 (Expandir a Pesquisa), _ age (Expandir a Pesquisa), _ agr (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 compared a now ) or ( 3 nacl comparing case now ))) or ( _ ago comparing case now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl compared a now ) OR ( 3 nacl comparing case now ))) OR ( _ ago comparing case now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl compared a now ) or ( 3 nacl comparing case now ))) or ( _ ago comparing case now ))*.