Talvez deva tentar algumas variações de ortografia:
unit computers » units computers (Expandir a Pesquisa), usin computers (Expandir a Pesquisa), using computers (Expandir a Pesquisa)
unit computer » units computers (Expandir a Pesquisa), tunis computer (Expandir a Pesquisa), ut computer (Expandir a Pesquisa)
computers may » computers a (Expandir a Pesquisa), computers can (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
nat compr » la compr (Expandir a Pesquisa)
compr can » comp can (Expandir a Pesquisa), compared can (Expandir a Pesquisa)
may netw » may new (Expandir a Pesquisa), may anett (Expandir a Pesquisa), may need (Expandir a Pesquisa)
a unit » a united (Expandir a Pesquisa)
_ unit » _ united (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j nat compr can new ) or ((( a unit computer can new ) or ( _ unit computers may netw ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j nat compr can new ) OR ((( a unit computer can new ) OR ( _ unit computers may netw )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j nat compr can new ) or ((( a unit computer can new ) or ( _ unit computers may netw ))))*.