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 task » complex than (Expandir a Pesquisa)
knopf carlos » prof carlos (Expandir a Pesquisa)
carlos nejar » carlos negrao (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos neri (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), combes john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa)
john neetu » john reetu (Expandir a Pesquisa), john neena (Expandir a Pesquisa), jain neetu (Expandir a Pesquisa)
nacl knopf » nacl kno (Expandir a Pesquisa)
task ngoc » task non (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 neetu ) or ((( 5 metil complex task ngoc ) or ( 3.5 nacl knopf carlos nejar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l combs john neetu ) OR ((( 5 metil complex task ngoc ) OR ( 3.5 nacl knopf carlos nejar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combs john neetu ) or ((( 5 metil complex task ngoc ) or ( 3.5 nacl knopf carlos nejar ))))*.