Talvez deva tentar algumas variações de ortografia:
complexes track » complexes eracs (Expandir a Pesquisa), complexes tacs (Expandir a Pesquisa), complexes attach (Expandir a Pesquisa)
combs bacon » com bacon (Expandir a Pesquisa), combs jason (Expandir a Pesquisa), combs brandon (Expandir a Pesquisa)
nabr carlos » najar carlos (Expandir a Pesquisa), nader carlos (Expandir a Pesquisa), jair carlos (Expandir a Pesquisa)
carlos nadh » carlos nardi (Expandir a Pesquisa), carlos nadaf (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa)
track ngoc » tran ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa), trang ngoc (Expandir a Pesquisa)
nacl nabr » nacl kbr (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
l combs » e combs (Expandir a Pesquisa), _ combs (Expandir a Pesquisa), l comps (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 l combs bacon p ) OR ((( 5 metal complexes track ngoc ) OR ( 7.5 nacl nabr carlos nadh ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l combs bacon p ) OR ((( 5 metal complexes track ngoc ) OR ( 7.5 nacl nabr carlos nadh ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs bacon p ) OR ((( 5 metal complexes track ngoc ) OR ( 7.5 nacl nabr carlos nadh ))))*.