Talvez deva tentar algumas variações de ortografia:
shale companies » shame companies (Expandir a Pesquisa), share companies (Expandir a Pesquisa), state companies (Expandir a Pesquisa)
all computers » small computers (Expandir a Pesquisa), call computer (Expandir a Pesquisa), a computers (Expandir a Pesquisa)
companies can » companies case (Expandir a Pesquisa), companies a (Expandir a Pesquisa), companies cut (Expandir a Pesquisa)
nagy compare » copy compare (Expandir a Pesquisa)
computers a » computers _ (Expandir a Pesquisa)
d.j shale » de shale (Expandir a Pesquisa)
compare a » compare _ (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), _ now (Expandir a Pesquisa), a nos (Expandir a Pesquisa)
a non » _ non (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: (( _ all computers a now ) or ((( d.j shale companies can now ) or ( i nagy compare a non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ all computers a now ) OR ((( d.j shale companies can now ) OR ( i nagy compare a non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ all computers a now ) or ((( d.j shale companies can now ) or ( i nagy compare a non ))))*.