Talvez deva tentar algumas variações de ortografia:
complex concept » complex concepts (Expandir a Pesquisa), complex context (Expandir a Pesquisa), complex connects (Expandir a Pesquisa)
joint complex » joint computer (Expandir a Pesquisa)
carlos carla » carlos camila (Expandir a Pesquisa), carlos carlos (Expandir a Pesquisa), carlos calva (Expandir a Pesquisa)
nano carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), nuno carlos (Expandir a Pesquisa)
hobbs john » hobbs jean (Expandir a Pesquisa)
john neil » johns neil (Expandir a Pesquisa), cohn neil (Expandir a Pesquisa), johnson neil (Expandir a Pesquisa)
concept n » concept _ (Expandir a Pesquisa), concept a (Expandir a Pesquisa), concept 2 (Expandir a Pesquisa)
nacl nano » nacl kno (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa)
l hobbs » j hobbs (Expandir a Pesquisa), _ hobbs (Expandir a Pesquisa), m hobbs (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 l hobbs john neil ) or ((( _ joint complex concept n ) or ( 0.9 nacl nano carlos carla ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l hobbs john neil ) OR ((( _ joint complex concept n ) OR ( 0.9 nacl nano carlos carla )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l hobbs john neil ) or ((( _ joint complex concept n ) or ( 0.9 nacl nano carlos carla ))))*.