Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex tail » complex trait (Expandir a Pesquisa), complex task (Expandir a Pesquisa), complex thin (Expandir a Pesquisa)
carlos roger » carlos rogerio (Expandir a Pesquisa), carlos romero (Expandir a Pesquisa), carlos robert (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
kno carlos » knopf carlos (Expandir a Pesquisa), cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa)
john net » john new (Expandir a Pesquisa), john neetu (Expandir a Pesquisa), john asnet (Expandir a Pesquisa)
tail non » tailed non (Expandir a Pesquisa), tail bond (Expandir a Pesquisa), tail can (Expandir a Pesquisa)
3.5 nucl » 3.5 nacl (Expandir a Pesquisa), 34.5 null (Expandir a Pesquisa), 3 nucl (Expandir a Pesquisa)
nucl kno » nacl kno (Expandir a Pesquisa), nucl eng (Expandir a Pesquisa)
5 metal » 5 metil (Expandir a Pesquisa), 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 john net ) or ((( 5 metal complex tail non ) or ( 3.5 nucl kno carlos roger ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs john net ) OR ((( 5 metal complex tail non ) OR ( 3.5 nucl kno carlos roger )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs john net ) or ((( 5 metal complex tail non ) or ( 3.5 nucl kno carlos roger ))))*.