Talvez deva tentar algumas variações de ortografia:
computer added » computer aided (Expandir a Pesquisa), computer coded (Expandir a Pesquisa), computer add (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), new clamp (Expandir a Pesquisa)
clamp cum » clamp m (Expandir a Pesquisa), clamp can (Expandir a Pesquisa), clamp em (Expandir a Pesquisa)
clamp pcr » amp pcr (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa)
pcr newts » pcr new (Expandir a Pesquisa)
added na1 » added nadh (Expandir a Pesquisa), added a (Expandir a Pesquisa), added fat (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), c clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa)
j nail » j nair (Expandir a Pesquisa), j naik (Expandir a Pesquisa), j naim (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( j nat clamp cum near ) or ( j a clamp pcr newts ))) or ( j nail computer added na1 ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat clamp cum near ) OR ( j a clamp pcr newts ))) OR ( j nail computer added na1 )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat clamp cum near ) or ( j a clamp pcr newts ))) or ( j nail computer added na1 ))*.