Talvez deva tentar algumas variações de ortografia:
complex derived » complexes derived (Expandir a Pesquisa)
derived ngoc » derived non (Expandir a Pesquisa), derived ngf (Expandir a Pesquisa), derived no2 (Expandir a Pesquisa)
abrao carlos » cabral carlos (Expandir a Pesquisa), abreu carlos (Expandir a Pesquisa), abril carlos (Expandir a Pesquisa)
mec complex » sec complex (Expandir a Pesquisa), c complex (Expandir a Pesquisa), bc complex (Expandir a Pesquisa)
carlos nava » carlos navarro (Expandir a Pesquisa), carlos eslava (Expandir a Pesquisa), carlos zavala (Expandir a Pesquisa)
combs con » combs colin (Expandir a Pesquisa), combs john (Expandir a Pesquisa), combs c (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
l combs » e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa), l comps (Expandir a Pesquisa)
con net » con nee (Expandir a Pesquisa), non net (Expandir a Pesquisa), con note (Expandir a Pesquisa)
_ mec » _ men (Expandir a Pesquisa), _ mek (Expandir a Pesquisa), _ met (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 con net ) OR ((( _ mec complex derived ngoc ) OR ( 3.5 nacl abrao carlos nava ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l combs con net ) OR ((( _ mec complex derived ngoc ) OR ( 3.5 nacl abrao carlos nava ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs con net ) OR ((( _ mec complex derived ngoc ) OR ( 3.5 nacl abrao carlos nava ))))*.