Talvez deva tentar algumas variações de ortografia:
head company » held company (Expandir a Pesquisa), lead company (Expandir a Pesquisa), bad company (Expandir a Pesquisa)
nucl complex » nacl complex (Expandir a Pesquisa), cl complex (Expandir a Pesquisa), curl complex (Expandir a Pesquisa)
company case » company based (Expandir a Pesquisa), company a (Expandir a Pesquisa)
summers jan » summers jane (Expandir a Pesquisa), summers jean (Expandir a Pesquisa), summers ian (Expandir a Pesquisa)
complex use » complex causes (Expandir a Pesquisa), complex using (Expandir a Pesquisa), complex under (Expandir a Pesquisa)
jan newton » jean newton (Expandir a Pesquisa), john newton (Expandir a Pesquisa), a newton (Expandir a Pesquisa)
case non » cause non (Expandir a Pesquisa), case note (Expandir a Pesquisa), phase non (Expandir a Pesquisa)
3 nucl » 3 null (Expandir a Pesquisa)
l head » l heald (Expandir a Pesquisa), l heard (Expandir a Pesquisa), l heat (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: (( j _ summers jan newton ) or ((( 3 nucl complex use new ) or ( l head company case non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ summers jan newton ) OR ((( 3 nucl complex use new ) OR ( l head company case non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ summers jan newton ) or ((( 3 nucl complex use new ) or ( l head company case non ))))*.