Talvez deva tentar algumas variações de ortografia:
computer age » computer image (Expandir a Pesquisa), computer a (Expandir a Pesquisa), computer aided (Expandir a Pesquisa)
al computer » dal computer (Expandir a Pesquisa), apl computer (Expandir a Pesquisa), il computer (Expandir a Pesquisa)
clamp from » amp from (Expandir a Pesquisa), clamped frog (Expandir a Pesquisa)
nat clamp » dnan clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa), new clamp (Expandir a Pesquisa)
from near » from nepal (Expandir a Pesquisa)
clamp pcr » lamp pcr (Expandir a Pesquisa), clamp pcna (Expandir a Pesquisa), amp pcr (Expandir a Pesquisa)
pcr newts » pcr new (Expandir a Pesquisa), pcr next (Expandir a Pesquisa)
a clamp » dna clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)
age now » age new (Expandir a Pesquisa), age non (Expandir a Pesquisa), care now (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (Expandir a Pesquisa)
j al » j l (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 from near ) or ( j a clamp pcr newts ))) or ( j al computer age now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat clamp from near ) OR ( j a clamp pcr newts ))) OR ( j al computer age now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat clamp from near ) or ( j a clamp pcr newts ))) or ( j al computer age now ))*.