Talvez deva tentar algumas variações de ortografia:
computer classes » computer clusters (Expandir a Pesquisa), computer cluster (Expandir a Pesquisa), computer case (Expandir a Pesquisa)
model computer » models computer (Expandir a Pesquisa), modern computer (Expandir a Pesquisa), models computed (Expandir a Pesquisa)
nao computer » a computer (Expandir a Pesquisa), can computer (Expandir a Pesquisa), two computer (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
classes na » classes a (Expandir a Pesquisa), classes _ (Expandir a Pesquisa), classes de (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
a clamp » c clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)
_ model » _ modern (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: (((( e nao computer can near ) or ( j a clamp _ newts ))) or ( _ model computer classes na ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( e nao computer can near ) OR ( j a clamp _ newts ))) OR ( _ model computer classes na )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( e nao computer can near ) or ( j a clamp _ newts ))) or ( _ model computer classes na ))*.