Talvez deva tentar algumas variações de ortografia:
held computers » held computer (Expandir a Pesquisa), handheld computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
computer code » computer model (Expandir a Pesquisa), computer models (Expandir a Pesquisa), computer crime (Expandir a Pesquisa)
nao computer » a computer (Expandir a Pesquisa), can computer (Expandir a Pesquisa), two computer (Expandir a Pesquisa)
code newts » code net (Expandir a Pesquisa), code new (Expandir a Pesquisa)
compra can » compra con (Expandir a Pesquisa), compra en (Expandir a Pesquisa), compra da (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
j held » j head (Expandir a Pesquisa)
_ de » _ e (Expandir a Pesquisa), _ d (Expandir a Pesquisa), e de (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 held computers can netw ) OR ( e nao computer code newts ))) OR ( _ de compra can near ))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j held computers can netw ) OR ( e nao computer code newts ))) OR ( _ de compra can near ))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j held computers can netw ) OR ( e nao computer code newts ))) OR ( _ de compra can near ))*.