Talvez deva tentar algumas variações de ortografia:
companies cause » companies case (Expandir a Pesquisa), companies use (Expandir a Pesquisa), companies accused (Expandir a Pesquisa)
computer based » computer aided (Expandir a Pesquisa)
gas companies » _ companies (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
salt company » holt company (Expandir a Pesquisa), salient company (Expandir a Pesquisa), ballet company (Expandir a Pesquisa)
company law » company a (Expandir a Pesquisa)
cause new » causes new (Expandir a Pesquisa), use new (Expandir a Pesquisa), cause non (Expandir a Pesquisa)
law non » law note (Expandir a Pesquisa), thaw non (Expandir a Pesquisa)
j gas » j gasa (Expandir a Pesquisa), j gast (Expandir a Pesquisa), _ gas (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: (( _ nat computer based non ) or ((( j gas companies cause new ) or ( _ salt company law non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ nat computer based non ) OR ((( j gas companies cause new ) OR ( _ salt company law non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ nat computer based non ) or ((( j gas companies cause new ) or ( _ salt company law non ))))*.