Talvez deva tentar algumas variações de ortografia:
company based » competency based (Expandir a Pesquisa)
complex cause » complex causes (Expandir a Pesquisa), complex case (Expandir a Pesquisa), complex care (Expandir a Pesquisa)
nucl complex » nacl complex (Expandir a Pesquisa), nsl complex (Expandir a Pesquisa), cl complex (Expandir a Pesquisa)
cole company » cola company (Expandir a Pesquisa), coll company (Expandir a Pesquisa), core company (Expandir a Pesquisa)
sommers jan » sommer jan (Expandir a Pesquisa), somers jan (Expandir a Pesquisa), sommers dan (Expandir a Pesquisa)
jan newton » jean newton (Expandir a Pesquisa), john newton (Expandir a Pesquisa), n newton (Expandir a Pesquisa)
l sommers » _ sommers (Expandir a Pesquisa), a sommers (Expandir a Pesquisa), l summers (Expandir a Pesquisa)
cause non » causes non (Expandir a Pesquisa)
3 nucl » 3 null (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 l sommers jan newton ) OR ((( 3 nucl complex cause non ) OR ( l cole company based non ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l sommers jan newton ) OR ((( 3 nucl complex cause non ) OR ( l cole company based non ))))*.