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 tran » complex trans (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
carlos nova » carlos novoa (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa)
kno carlos » knopf carlos (Expandir a Pesquisa), cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa)
comes con » comes can (Expandir a Pesquisa), comunes con (Expandir a Pesquisa), comes down (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
nacl kno » nacl nano (Expandir a Pesquisa), nacl en (Expandir a Pesquisa), nacl kcl (Expandir a Pesquisa)
m comes » m coomes (Expandir a Pesquisa), m comps (Expandir a Pesquisa), m comas (Expandir a Pesquisa)
con nee » con net (Expandir a Pesquisa), con noe (Expandir a Pesquisa), con note (Expandir a Pesquisa)
ngoc » ngo (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 m comes con nee ) OR ((( 5 methyl complex tran ngoc ) OR ( 7.5 nacl kno carlos nova ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j m comes con nee ) OR ((( 5 methyl complex tran ngoc ) OR ( 7.5 nacl kno carlos nova ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m comes con nee ) OR ((( 5 methyl complex tran ngoc ) OR ( 7.5 nacl kno carlos nova ))))*.