Talvez deva tentar algumas variações de ortografia:
metil complex » metal complex (Expandir a Pesquisa), metals complex (Expandir a Pesquisa), met complex (Expandir a Pesquisa)
complex trap » complex tap (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex trans (Expandir a Pesquisa)
caso4 carlos » caso carlos (Expandir a Pesquisa), caro carlos (Expandir a Pesquisa), casal carlos (Expandir a Pesquisa)
carlos vidal » carlos hidalgo (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
nacl caso4 » nacl na2so4 (Expandir a Pesquisa)
john neue » john neper (Expandir a Pesquisa), john neil (Expandir a Pesquisa), john new (Expandir a Pesquisa)
trap ngo » trap net (Expandir a Pesquisa), sap ngo (Expandir a Pesquisa), trap co (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)
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 l combs john neue ) or ((( 5 metil complex trap ngo ) or ( 7.5 nacl caso4 carlos vidal ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l combs john neue ) OR ((( 5 metil complex trap ngo ) OR ( 7.5 nacl caso4 carlos vidal )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs john neue ) or ((( 5 metil complex trap ngo ) or ( 7.5 nacl caso4 carlos vidal ))))*.