Talvez deva tentar algumas variações de ortografia:
based companies » based composites (Expandir a Pesquisa), listed companies (Expandir a Pesquisa), based complexes (Expandir a Pesquisa)
haart compared » aspart compared (Expandir a Pesquisa), graft compared (Expandir a Pesquisa), fat compared (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
computer can » computers can (Expandir a Pesquisa), computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa)
companies a » companies _ (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
c haart » _ haart (Expandir a Pesquisa), c hart (Expandir a Pesquisa), a haart (Expandir a Pesquisa)
a ngoc » ha ngoc (Expandir a Pesquisa), ta ngoc (Expandir a Pesquisa), la ngoc (Expandir a Pesquisa)
_ nat » _ net (Expandir a Pesquisa), _ nad (Expandir a Pesquisa), _ nab (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: (((( c based companies a ngoc ) or ( c haart compared _ ngoc ))) or ( _ nat computer can netw ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( c based companies a ngoc ) OR ( c haart compared _ ngoc ))) OR ( _ nat computer can netw )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( c based companies a ngoc ) or ( c haart compared _ ngoc ))) or ( _ nat computer can netw ))*.