Talvez deva tentar algumas variações de ortografia:
natl compared » nacl compared (Expandir a Pesquisa), nail compared (Expandir a Pesquisa), acl compared (Expandir a Pesquisa)
ray computer » ray computed (Expandir a Pesquisa), uy computer (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
em newton » e newton (Expandir a Pesquisa), m newton (Expandir a Pesquisa), sm newton (Expandir a Pesquisa)
aided now » aided non (Expandir a Pesquisa), aided noma (Expandir a Pesquisa), aided n (Expandir a Pesquisa)
clamp em » clamp m (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa), clamp _ (Expandir a Pesquisa)
a clamp » _ clamp (Expandir a Pesquisa), c clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
_ ray » _ rat (Expandir a Pesquisa), x ray (Expandir a Pesquisa), _ ras (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 near ) or ( j a clamp em newton ))) or ( _ ray computer aided now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl compared a near ) OR ( j a clamp em newton ))) OR ( _ ray computer aided now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl compared a near ) or ( j a clamp em newton ))) or ( _ ray computer aided now ))*.