Talvez deva tentar algumas variações de ortografia:
metil complex » metal complex (Expandir a Pesquisa), medial complex (Expandir a Pesquisa), metals complex (Expandir a Pesquisa)
complex gene » complex genetic (Expandir a Pesquisa)
carlos nejar » carlos negrao (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa)
chan carlos » juan carlos (Expandir a Pesquisa), jean carlos (Expandir a Pesquisa), san carlos (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
ngoc chan » ngoc can (Expandir a Pesquisa), ngoc han (Expandir a Pesquisa), ngoc chau (Expandir a Pesquisa)
john nee » john new (Expandir a Pesquisa), john neena (Expandir a Pesquisa), john neetu (Expandir a Pesquisa)
gene new » genes new (Expandir a Pesquisa), gene nef (Expandir a Pesquisa), gene next (Expandir a Pesquisa)
5 metil » 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 _ combs john nee ) or ((( 5 metil complex gene new ) or ( 7.2 ngoc chan carlos nejar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs john nee ) OR ((( 5 metil complex gene new ) OR ( 7.2 ngoc chan carlos nejar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs john nee ) or ((( 5 metil complex gene new ) or ( 7.2 ngoc chan carlos nejar ))))*.