Talvez deva tentar algumas variações de ortografia:
computer sided » computer aided (Expandir a Pesquisa), computer guided (Expandir a Pesquisa), computer video (Expandir a Pesquisa)
nail computer » daily computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa), il computer (Expandir a Pesquisa)
nat clamp » dnan clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa), aaa clamp (Expandir a Pesquisa)
clamp cum » clamp m (Expandir a Pesquisa), clamp can (Expandir a Pesquisa), clamp em (Expandir a Pesquisa)
clamp pcr » lamp pcr (Expandir a Pesquisa), clamp pcna (Expandir a Pesquisa), amp pcr (Expandir a Pesquisa)
pcr newts » pcr next (Expandir a Pesquisa), pcr new (Expandir a Pesquisa)
sided now » sides now (Expandir a Pesquisa), sided non (Expandir a Pesquisa), sided ngs (Expandir a Pesquisa)
cum near » com near (Expandir a Pesquisa), nm near (Expandir a Pesquisa), cum ar (Expandir a Pesquisa)
a clamp » _ clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)
3 nail » _ nail (Expandir a Pesquisa), a nail (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), a 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 nat clamp cum near ) OR ( j a clamp pcr newts ))) OR ( 3 nail computer sided now ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat clamp cum near ) OR ( j a clamp pcr newts ))) OR ( 3 nail computer sided now ))*.