Talvez deva tentar algumas variações de ortografia:
computer causes » computer classes (Expandir a Pesquisa), computer courses (Expandir a Pesquisa), computer case (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
compas can » compass can (Expandir a Pesquisa), company can (Expandir a Pesquisa), compas dans (Expandir a Pesquisa)
causes new » causes non (Expandir a Pesquisa)
dna clamp » a clamp (Expandir a Pesquisa)
clamp can » clamp a (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa)
y compas » al compas (Expandir a Pesquisa), y compris (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa)
1 dna » _ dna (Expandir a Pesquisa), a dna (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (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 y compas can near ) OR ( 1 dna clamp can new ))) OR ( j nat computer causes new ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j y compas can near ) OR ( 1 dna clamp can new ))) OR ( j nat computer causes new ))*.