Talvez deva tentar algumas variações de ortografia:
using computers » using computer (Expandir a Pesquisa), using computed (Expandir a Pesquisa), using computerized (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
oil company » oil companies (Expandir a Pesquisa)
company law » company a (Expandir a Pesquisa)
computer a » computer _ (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), cao ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa)
law now » laws now (Expandir a Pesquisa), law non (Expandir a Pesquisa), law new (Expandir a Pesquisa)
j oil » _ oil (Expandir a Pesquisa), l oil (Expandir a Pesquisa), i oil (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: (((( _ nat computer a new ) OR ( 6j using computers can ngoc ))) OR ( j oil company law now ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( _ nat computer a new ) or ( 6j using computers can ngoc ))) or ( j oil company law now ))*.