Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
dam computer » cam computer (Expandir a Pesquisa), dem computer (Expandir a Pesquisa), beam computer (Expandir a Pesquisa)
dna clamp » a clamp (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
nat comp » et comp (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 a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (Expandir a Pesquisa)
j dna » _ dna (Expandir a Pesquisa), a dna (Expandir a Pesquisa), 1 dna (Expandir a Pesquisa)
a dam » a dama (Expandir a Pesquisa), a day (Expandir a Pesquisa), _ dam (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 nat comp can near ) or ( j dna clamp a new ))) or ( a dam computer based now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat comp can near ) OR ( j dna clamp a new ))) OR ( a dam computer based now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat comp can near ) or ( j dna clamp a new ))) or ( a dam computer based now ))*.