Talvez deva tentar algumas variações de ortografia:
methyl complex » metal complex (Expandir a Pesquisa), method complex (Expandir a Pesquisa), methylase complex (Expandir a Pesquisa)
complex trace » complex traces (Expandir a Pesquisa), complexed trace (Expandir a Pesquisa), complex tracks (Expandir a Pesquisa)
nano carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), nuno carlos (Expandir a Pesquisa)
carlos nava » carlos navarro (Expandir a Pesquisa), carlos eslava (Expandir a Pesquisa), carlos zavala (Expandir a Pesquisa)
trace ngoc » tran ngoc (Expandir a Pesquisa), thach ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa)
nacl nano » nacl kno (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa)
0.9 nacl » 3.5 nacl (Expandir a Pesquisa)
e combs » sex combs (Expandir a Pesquisa)
combs b » combs _ (Expandir a Pesquisa), combs c (Expandir a Pesquisa)
b netto » b neto (Expandir a Pesquisa), _ netto (Expandir a Pesquisa), g netto (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 e combs b netto ) OR ((( 5 methyl complex trace ngoc ) OR ( 0.9 nacl nano carlos nava ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j e combs b netto ) OR ((( 5 methyl complex trace ngoc ) OR ( 0.9 nacl nano carlos nava ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e combs b netto ) OR ((( 5 methyl complex trace ngoc ) OR ( 0.9 nacl nano carlos nava ))))*.