Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
spray compared » assay compared (Expandir a Pesquisa), early compared (Expandir a Pesquisa), spray coated (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
arm clamp » from clamp (Expandir a Pesquisa), a clamp (Expandir a Pesquisa), aaa clamp (Expandir a Pesquisa)
based noc » based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa), based nod (Expandir a Pesquisa)
3 spray » 3d spray (Expandir a Pesquisa), _ spray (Expandir a Pesquisa), a spray (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
a newts » _ newts (Expandir a Pesquisa), a news (Expandir a Pesquisa), a newt (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)
c arm » _ arm (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.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( 3 spray compared a now ) OR ( c arm clamp a newts ))) OR ( j nat computer based noc ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 3 spray compared a now ) or ( c arm clamp a newts ))) or ( j nat computer based noc ))*.