Talvez deva tentar algumas variações de ortografia:
charles negrao » carlos negrao (Expandir a Pesquisa), charles nora (Expandir a Pesquisa), charles neal (Expandir a Pesquisa)
complex stroke » completed stroke (Expandir a Pesquisa), complex stress (Expandir a Pesquisa), complex story (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
stroke non » stroke note (Expandir a Pesquisa), stroke new (Expandir a Pesquisa), stroke among (Expandir a Pesquisa)
nacl diehl » nacl diet (Expandir a Pesquisa), marcel diehl (Expandir a Pesquisa)
john node » john nyide (Expandir a Pesquisa), john foden (Expandir a Pesquisa), john noble (Expandir a Pesquisa)
l combs » e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa), l comps (Expandir a Pesquisa)
5 metal » 5 metil (Expandir a Pesquisa), 5 methyl (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (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 combs john node ) or ((( 5 metal complex stroke non ) or ( 3 nacl diehl charles negrao ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l combs john node ) OR ((( 5 metal complex stroke non ) OR ( 3 nacl diehl charles negrao )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs john node ) or ((( 5 metal complex stroke non ) or ( 3 nacl diehl charles negrao ))))*.