Talvez deva tentar algumas variações de ortografia:
complex metallic » complex metabolic (Expandir a Pesquisa), complex mental (Expandir a Pesquisa)
coast complex » coat complex (Expandir a Pesquisa), coastal complex (Expandir a Pesquisa), corest complex (Expandir a Pesquisa)
metallic foam » metallic foams (Expandir a Pesquisa), metallic film (Expandir a Pesquisa), metallic films (Expandir a Pesquisa)
knot carlos » knopf carlos (Expandir a Pesquisa), enout carlos (Expandir a Pesquisa), knecht carlos (Expandir a Pesquisa)
nacl knot » nacl kno (Expandir a Pesquisa), nacl mno (Expandir a Pesquisa), nacl npt (Expandir a Pesquisa)
l cooper » i cooper (Expandir a Pesquisa), m cooper (Expandir a Pesquisa), a cooper (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
_ coast » _ coastal (Expandir a Pesquisa)
john _ » john a (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l cooper john _ ) OR ((( _ coast complex metallic foam ) OR ( 7.5 nacl knot carlos rojas ))))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l cooper john _ ) or ((( _ coast complex metallic foam ) or ( 7.5 nacl knot carlos rojas ))))*.