Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
natal compared » nacl compared (Expandir a Pesquisa), fetal compared (Expandir a Pesquisa), metal compared (Expandir a Pesquisa)
dale computer » dal computer (Expandir a Pesquisa), maple computer (Expandir a Pesquisa), scale computer (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
clamp cum » clamp m (Expandir a Pesquisa), clamp can (Expandir a Pesquisa), clamp em (Expandir a Pesquisa)
cum newts » can newts (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
a natal » a natale (Expandir a Pesquisa), a natural (Expandir a Pesquisa)
a clamp » c clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa), a claims (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: (((( a natal compared a near ) or ( j a clamp cum newts ))) or ( j dale computer based now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( a natal compared a near ) OR ( j a clamp cum newts ))) OR ( j dale computer based now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( a natal compared a near ) or ( j a clamp cum newts ))) or ( j dale computer based now ))*.