Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
ray computer » ray computed (Expandir a Pesquisa), uy computer (Expandir a Pesquisa)
natl comp » al comp (Expandir a Pesquisa), natalia comp (Expandir a Pesquisa)
dna clamp » a clamp (Expandir a Pesquisa)
based no2 » based non (Expandir a Pesquisa), based noc (Expandir a Pesquisa), based nod (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
clamp ar » clamp a (Expandir a Pesquisa), clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
ar newts » can newts (Expandir a Pesquisa), _ newts (Expandir a Pesquisa), war news (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
j dna » _ dna (Expandir a Pesquisa), a dna (Expandir a Pesquisa), 1 dna (Expandir a Pesquisa)
j ray » x ray (Expandir a Pesquisa), _ ray (Expandir a Pesquisa), w ray (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl comp can near ) OR ( j dna clamp ar newts ))) OR ( j ray computer based no2 ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl comp can near ) or ( j dna clamp ar newts ))) or ( j ray computer based no2 ))*.