Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex tran » complex trans (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
marco carlos » marcio carlos (Expandir a Pesquisa), mario carlos (Expandir a Pesquisa), marcelo carlos (Expandir a Pesquisa)
carlos nava » carlos navarro (Expandir a Pesquisa), carlos eslava (Expandir a Pesquisa), carlos zavala (Expandir a Pesquisa)
nacl marco » cscl marco (Expandir a Pesquisa)
e coombs » de coombs (Expandir a Pesquisa), e coombes (Expandir a Pesquisa), g coombs (Expandir a Pesquisa)
john new » john agnew (Expandir a Pesquisa), john neil (Expandir a Pesquisa), john n (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
5 metal » 5 methyl (Expandir a Pesquisa)
ngoc » ngo (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 coombs john new ) or ((( 5 metal complex tran ngoc ) or ( 7.5 nacl marco carlos nava ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j e coombs john new ) OR ((( 5 metal complex tran ngoc ) OR ( 7.5 nacl marco carlos nava )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e coombs john new ) or ((( 5 metal complex tran ngoc ) or ( 7.5 nacl marco carlos nava ))))*.