Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex trait » complex traits (Expandir a Pesquisa)
coomber john » coombes john (Expandir a Pesquisa), cooper john (Expandir a Pesquisa), coombs john (Expandir a Pesquisa)
najar carlos » nejar carlos (Expandir a Pesquisa), fajardo carlos (Expandir a Pesquisa), baltar carlos (Expandir a Pesquisa)
carlos nodal » carlos vidal (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos nejar (Expandir a Pesquisa)
nacl najar » al najar (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa)
l coomber » l cooper (Expandir a Pesquisa), k coombes (Expandir a Pesquisa)
trait ngo » trait co (Expandir a Pesquisa)
john new » john agnew (Expandir a Pesquisa), john neil (Expandir a Pesquisa), john n (Expandir a Pesquisa)
5 metal » 5 methyl (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 coomber john new ) or ((( 5 metal complex trait ngo ) or ( 0.9 nacl najar carlos nodal ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l coomber john new ) OR ((( 5 metal complex trait ngo ) OR ( 0.9 nacl najar carlos nodal )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l coomber john new ) or ((( 5 metal complex trait ngo ) or ( 0.9 nacl najar carlos nodal ))))*.