Talvez deva tentar algumas variações de ortografia:
complex metallic » complex metabolic (Expandir a Pesquisa), complex mental (Expandir a Pesquisa)
metallic foam » metallic foams (Expandir a Pesquisa), metallic film (Expandir a Pesquisa), metallic films (Expandir a Pesquisa)
coat complex » joint complex (Expandir a Pesquisa), about complex (Expandir a Pesquisa), fact complex (Expandir a Pesquisa)
kno carlos » knopf carlos (Expandir a Pesquisa), cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa)
j cooper » _ cooper (Expandir a Pesquisa), i cooper (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
nacl kno » nacl nano (Expandir a Pesquisa), nacl en (Expandir a Pesquisa), nacl kcl (Expandir a Pesquisa)
john _ » john a (Expandir a Pesquisa)
_ coat » _ coast (Expandir a Pesquisa), _ coal (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 j cooper john _ ) or ((( _ coat complex metallic foam ) or ( 7.5 nacl kno carlos rojas ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j j cooper john _ ) OR ((( _ coat complex metallic foam ) OR ( 7.5 nacl kno carlos rojas )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j j cooper john _ ) or ((( _ coat complex metallic foam ) or ( 7.5 nacl kno carlos rojas ))))*.