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 tract » complex trait (Expandir a Pesquisa), complex trace (Expandir a Pesquisa), complex extract (Expandir a Pesquisa)
carlos bejar » carlos nejar (Expandir a Pesquisa), carlos vejar (Expandir a Pesquisa), carlos beccar (Expandir a Pesquisa)
nair carlos » jair carlos (Expandir a Pesquisa), naim carlos (Expandir a Pesquisa), vanair carlos (Expandir a Pesquisa)
tract ngoc » tran ngoc (Expandir a Pesquisa), thach ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa)
combs con » combs colin (Expandir a Pesquisa), combs john (Expandir a Pesquisa), combs cody (Expandir a Pesquisa)
nacl nair » nacl nabr (Expandir a Pesquisa), nacl nano (Expandir a Pesquisa), nacl na (Expandir a Pesquisa)
con net » con nee (Expandir a Pesquisa), non net (Expandir a Pesquisa)
3 nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3.5 nacl (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 con net ) or ((( 5 methyl complex tract ngoc ) or ( 3 nacl nair carlos bejar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs con net ) OR ((( 5 methyl complex tract ngoc ) OR ( 3 nacl nair carlos bejar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs con net ) or ((( 5 methyl complex tract ngoc ) or ( 3 nacl nair carlos bejar ))))*.