Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
gas companies » _ companies (Expandir a Pesquisa)
ware compared » care compared (Expandir a Pesquisa), ward compared (Expandir a Pesquisa), were compared (Expandir a Pesquisa)
ada computer » pada computer (Expandir a Pesquisa), data computer (Expandir a Pesquisa), area computer (Expandir a Pesquisa)
companies a » companies _ (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
j ware » j wade (Expandir a Pesquisa), j ward (Expandir a Pesquisa), j wave (Expandir a Pesquisa)
e ada » e adam (Expandir a Pesquisa), _ ada (Expandir a Pesquisa), e ana (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: (( e ada computer based now ) or ((( j gas companies a new ) or ( j ware compared a note ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( e ada computer based now ) OR ((( j gas companies a new ) OR ( j ware compared a note )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( e ada computer based now ) or ((( j gas companies a new ) or ( j ware compared a note ))))*.