Talvez deva tentar algumas variações de ortografia:
metil complex » metal complex (Expandir a Pesquisa), metals complex (Expandir a Pesquisa), met complex (Expandir a Pesquisa)
emilio carlos » zilio carlos (Expandir a Pesquisa), julio carlos (Expandir a Pesquisa), alio carlos (Expandir a Pesquisa)
carlos zavala » carlos ayala (Expandir a Pesquisa), carlos zapata (Expandir a Pesquisa), cortes zavala (Expandir a Pesquisa)
complex than » complex trait (Expandir a Pesquisa)
nacl emilio » raul emilio (Expandir a Pesquisa), paul emilio (Expandir a Pesquisa), maciel emilio (Expandir a Pesquisa)
than ngoc » thanh ngoc (Expandir a Pesquisa), thuan ngoc (Expandir a Pesquisa), tran ngoc (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)
combs c » combs _ (Expandir a Pesquisa)
5 metil » 5 methyl (Expandir a Pesquisa)
c nee » c need (Expandir a Pesquisa), c neel (Expandir a Pesquisa), c neu (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 c nee ) OR ((( 5 metil complex than ngoc ) OR ( 7.5 nacl emilio carlos zavala ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l combs c nee ) OR ((( 5 metil complex than ngoc ) OR ( 7.5 nacl emilio carlos zavala ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs c nee ) OR ((( 5 metil complex than ngoc ) OR ( 7.5 nacl emilio carlos zavala ))))*.