Talvez deva tentar algumas variações de ortografia:
model computer » models computer (Expandir a Pesquisa), modern computer (Expandir a Pesquisa), models computed (Expandir a Pesquisa)
computer age » computer image (Expandir a Pesquisa), computer a (Expandir a Pesquisa), computer aided (Expandir a Pesquisa)
natl comp » al comp (Expandir a Pesquisa), natalia comp (Expandir a Pesquisa)
dna clamp » a clamp (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)
j model » j modolo (Expandir a Pesquisa), j monder (Expandir a Pesquisa)
age now » age new (Expandir a Pesquisa), age non (Expandir a Pesquisa), care now (Expandir a Pesquisa)
j natl » j nail (Expandir a Pesquisa), _ natl (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
ar new » war new (Expandir a Pesquisa), bar new (Expandir a Pesquisa), ear new (Expandir a Pesquisa)
a dna » _ dna (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j natl comp can near ) OR ( a dna clamp ar new ))) OR ( j model computer age now ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl comp can near ) OR ( a dna clamp ar new ))) OR ( j model computer age now ))*.