Talvez deva tentar algumas variações de ortografia:
complex concepts » complex confers (Expandir a Pesquisa), complex controls (Expandir a Pesquisa), complex concentrates (Expandir a Pesquisa)
carlos nadale » carlos casale (Expandir a Pesquisa), carlos nodal (Expandir a Pesquisa), carlos vidales (Expandir a Pesquisa)
most complex » most complete (Expandir a Pesquisa), coat complex (Expandir a Pesquisa), cst complex (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
concepts 2 » concepts _ (Expandir a Pesquisa), concepts a (Expandir a Pesquisa), concepts 3 (Expandir a Pesquisa)
na carlos » ona carlos (Expandir a Pesquisa), ana carlos (Expandir a Pesquisa), a carlos (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
e combs » sex combs (Expandir a Pesquisa)
50 most » 100 most (Expandir a Pesquisa)
nacl na » nacl nas (Expandir a Pesquisa), nacl a (Expandir a Pesquisa), nacl nabr (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 e combs john n ) or ((( 50 most complex concepts 2 ) or ( 7.5 nacl na carlos nadale ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j e combs john n ) OR ((( 50 most complex concepts 2 ) OR ( 7.5 nacl na carlos nadale )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e combs john n ) or ((( 50 most complex concepts 2 ) or ( 7.5 nacl na carlos nadale ))))*.