Talvez deva tentar algumas variações de ortografia:
computer's can » computers can (Expandir a Pesquisa), computer can (Expandir a Pesquisa), computers can't (Expandir a Pesquisa)
a computer's » a composer's (Expandir a Pesquisa), a computerised (Expandir a Pesquisa), a computed (Expandir a Pesquisa)
company cars » company car (Expandir a Pesquisa), company carlos (Expandir a Pesquisa), company case (Expandir a Pesquisa)
oil company » oil companies (Expandir a Pesquisa)
cars now » care now (Expandir a Pesquisa), cars how (Expandir a Pesquisa), card now (Expandir a Pesquisa)
kcl con » cl con (Expandir a Pesquisa), kcl co (Expandir a Pesquisa), bcl conf (Expandir a Pesquisa)
con now » con noe (Expandir a Pesquisa), con non (Expandir a Pesquisa), con note (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can new (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
3 oil » 3 oils (Expandir a Pesquisa), _ oil (Expandir a Pesquisa), l oil (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( 3 oil company cars now ) OR ( 3 nacl kcl con now ))) OR ( j a computer's can now ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 3 oil company cars now ) OR ( 3 nacl kcl con now ))) OR ( j a computer's can now ))*.