Talvez deva tentar algumas variações de ortografia:
complex connection » complex correction (Expandir a Pesquisa), complex infection (Expandir a Pesquisa), complex condition (Expandir a Pesquisa)
connection a » connection _ (Expandir a Pesquisa)
act complex » fact complex (Expandir a Pesquisa), cct complex (Expandir a Pesquisa), akt complex (Expandir a Pesquisa)
nano carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), nuno carlos (Expandir a Pesquisa)
carlos nara » carlos lara (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos jara (Expandir a Pesquisa)
hobbs john » hobbs jean (Expandir a Pesquisa)
nacl nano » nacl kno (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa)
e hobbs » e hobbes (Expandir a Pesquisa), j hobbs (Expandir a Pesquisa), _ hobbs (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 e hobbs john n ) OR ((( _ act complex connection a ) OR ( 3.5 nacl nano carlos nara ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e hobbs john n ) OR ((( _ act complex connection a ) OR ( 3.5 nacl nano carlos nara ))))*.