Talvez deva tentar algumas variações de ortografia:
knecht carlos » knecht carolin (Expandir a Pesquisa)
metil complex » metal complex (Expandir a Pesquisa), metals complex (Expandir a Pesquisa), met complex (Expandir a Pesquisa)
complex tran » complex trans (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
carlos juca » carlos juan (Expandir a Pesquisa), carlos julio (Expandir a Pesquisa)
c.m teach » c.m bach (Expandir a Pesquisa)
teach new » reach new (Expandir a Pesquisa), teaching new (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
5 metil » 5 methyl (Expandir a Pesquisa)
l c.m » l com (Expandir a Pesquisa), l cam (Expandir a Pesquisa), _ c.m (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 l c.m teach new ) or ((( 5 metil complex tran ngoc ) or ( 3.5 nacl knecht carlos juca ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l c.m teach new ) OR ((( 5 metil complex tran ngoc ) OR ( 3.5 nacl knecht carlos juca )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l c.m teach new ) or ((( 5 metil complex tran ngoc ) or ( 3.5 nacl knecht carlos juca ))))*.