Talvez deva tentar algumas variações de ortografia:
comoanies case » companies case (Expandir a Pesquisa), companies cater (Expandir a Pesquisa), companies can (Expandir a Pesquisa)
nat comoanies » meat companies (Expandir a Pesquisa), rat colonies (Expandir a Pesquisa), bat colonies (Expandir a Pesquisa)
nata complex » beta complex (Expandir a Pesquisa), ada complex (Expandir a Pesquisa), natural complex (Expandir a Pesquisa)
complex can » complex case (Expandir a Pesquisa), complex care (Expandir a Pesquisa), complex cell (Expandir a Pesquisa)
case netw » case new (Expandir a Pesquisa), case note (Expandir a Pesquisa), case near (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
role dan » role dans (Expandir a Pesquisa), role can (Expandir a Pesquisa), cole dan (Expandir a Pesquisa)
dan non » than non (Expandir a Pesquisa), dan ning (Expandir a Pesquisa)
e nata » e natal (Expandir a Pesquisa), e nafta (Expandir a Pesquisa), e nada (Expandir a Pesquisa)
l role » l rose (Expandir a Pesquisa), l robles (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (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": "(((( j nat comoanies case netw ) OR ( e nata complex can netw ))) OR ( _ l role dan non ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat comoanies case netw ) OR ( e nata complex can netw ))) OR ( _ l role dan non ))*.