Talvez deva tentar algumas variações de ortografia:
computer classes » computer clusters (Expandir a Pesquisa), computer cluster (Expandir a Pesquisa), computer case (Expandir a Pesquisa)
apl computer » al computer (Expandir a Pesquisa), maple computer (Expandir a Pesquisa), call computer (Expandir a Pesquisa)
classes na » classes a (Expandir a Pesquisa), classes _ (Expandir a Pesquisa), classes de (Expandir a Pesquisa)
nat compr » la compr (Expandir a Pesquisa), nat comm (Expandir a Pesquisa)
compr can » comp can (Expandir a Pesquisa), computer can (Expandir a Pesquisa), compared can (Expandir a Pesquisa)
a clamp » _ clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)
clamp m » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa), clamp a (Expandir a Pesquisa)
m newts » _ newts (Expandir a Pesquisa), m news (Expandir a Pesquisa), m newton (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), a nat (Expandir a Pesquisa)
j apl » j appl (Expandir a Pesquisa), _ apl (Expandir a Pesquisa), c apl (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 compr can new ) or ( j a clamp m newts ))) or ( j apl computer classes na ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat compr can new ) OR ( j a clamp m newts ))) OR ( j apl computer classes na ))*.