Talvez deva tentar algumas variações de ortografia:
complex tract » complex trait (Expandir a Pesquisa), complex trace (Expandir a Pesquisa), complex extract (Expandir a Pesquisa)
met complex » yet complex (Expandir a Pesquisa), set complex (Expandir a Pesquisa), metal complex (Expandir a Pesquisa)
ning carlos » nino carlos (Expandir a Pesquisa), nin carlos (Expandir a Pesquisa), ing carlos (Expandir a Pesquisa)
colin nele » colin bell (Expandir a Pesquisa), colin dale (Expandir a Pesquisa), colin neil (Expandir a Pesquisa)
tract ngoc » tran ngoc (Expandir a Pesquisa), thach ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa)
nacl ning » nacl using (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa)
7.2 nacl » 7.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
l combs » e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa), l comps (Expandir a Pesquisa)
5 met » 5 meo (Expandir a Pesquisa), 5 mev (Expandir a Pesquisa), 5 mec (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 combs colin nele ) or ((( 5 met complex tract ngoc ) or ( 7.2 nacl ning carlos eslava ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l combs colin nele ) OR ((( 5 met complex tract ngoc ) OR ( 7.2 nacl ning carlos eslava )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs colin nele ) or ((( 5 met complex tract ngoc ) or ( 7.2 nacl ning carlos eslava ))))*.