Talvez deva tentar algumas variações de ortografia:
metil complex » metal complex (Expandir a Pesquisa), metals complex (Expandir a Pesquisa), met complex (Expandir a Pesquisa)
complex tran » complex trans (Expandir a Pesquisa), complex tehran (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
nunes carlos » gomes carlos (Expandir a Pesquisa)
carlos nava » carlos navarro (Expandir a Pesquisa), carlos eslava (Expandir a Pesquisa), carlos zavala (Expandir a Pesquisa)
combs icon » combs ian (Expandir a Pesquisa)
nacl nunes » nacl induces (Expandir a Pesquisa)
icon new » bacon new (Expandir a Pesquisa), icon fes (Expandir a Pesquisa), icon lem (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
5 metil » 5 methyl (Expandir a Pesquisa)
ngoc » ngo (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 icon new ) OR ((( 5 metil complex tran ngoc ) OR ( 7.5 nacl nunes carlos nava ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j _ combs icon new ) OR ((( 5 metil complex tran ngoc ) OR ( 7.5 nacl nunes carlos nava ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs icon new ) OR ((( 5 metil complex tran ngoc ) OR ( 7.5 nacl nunes carlos nava ))))*.