Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex tran » complex trans (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
singh chirom » singh dhiraj (Expandir a Pesquisa)
combs bacon » com bacon (Expandir a Pesquisa), combs jason (Expandir a Pesquisa), combs brandon (Expandir a Pesquisa)
chirom nora » chirom perla (Expandir a Pesquisa)
nacl singh » nacl using (Expandir a Pesquisa)
bacon new » bacon's new (Expandir a Pesquisa), bacon neil (Expandir a Pesquisa), bacon e (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
5 metal » 5 metil (Expandir a Pesquisa), 5 methyl (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 _ combs bacon new ) or ((( 5 metal complex tran ngoc ) or ( 7.5 nacl singh chirom nora ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs bacon new ) OR ((( 5 metal complex tran ngoc ) OR ( 7.5 nacl singh chirom nora )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs bacon new ) or ((( 5 metal complex tran ngoc ) or ( 7.5 nacl singh chirom nora ))))*.