Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
carlos poveda » carlos pereda (Expandir a Pesquisa), carlos pineda (Expandir a Pesquisa), carlos posada (Expandir a Pesquisa)
complex tram » complex trauma (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex trial (Expandir a Pesquisa)
knopf carlos » prof carlos (Expandir a Pesquisa)
combs mode » comb mode (Expandir a Pesquisa), combs todd (Expandir a Pesquisa), comb model (Expandir a Pesquisa)
nacl knopf » nacl kno (Expandir a Pesquisa)
tram ngoc » tran ngoc (Expandir a Pesquisa), tam ngoc (Expandir a Pesquisa), pham ngoc (Expandir a Pesquisa)
mode noe » mode non (Expandir a Pesquisa), mode noise (Expandir a Pesquisa), mode nodes (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 _ combs mode noe ) or ((( 5 metal complex tram ngoc ) or ( 0.9 nacl knopf carlos poveda ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs mode noe ) OR ((( 5 metal complex tram ngoc ) OR ( 0.9 nacl knopf carlos poveda )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs mode noe ) or ((( 5 metal complex tram ngoc ) or ( 0.9 nacl knopf carlos poveda ))))*.