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)
carlos hoelz » carlos heli (Expandir a Pesquisa), carlos hohl (Expandir a Pesquisa), carlos horle (Expandir a Pesquisa)
kcl carlos » kuhl carlos (Expandir a Pesquisa), gil carlos (Expandir a Pesquisa), l carlos (Expandir a Pesquisa)
el campo » del campo (Expandir a Pesquisa), el cambio (Expandir a Pesquisa)
campo ia » campo a (Expandir a Pesquisa), campo i (Expandir a Pesquisa), campo 2a (Expandir a Pesquisa)
0.9 nacl » 3.5 nacl (Expandir a Pesquisa)
5 metal » 5 methyl (Expandir a Pesquisa)
ia net » via net (Expandir a Pesquisa), ca net (Expandir a Pesquisa), ga net (Expandir a Pesquisa)
j el » j l (Expandir a Pesquisa), j e (Expandir a Pesquisa), j al (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 el campo ia net ) or ((( 5 metal complex tran ngoc ) or ( 0.9 nacl kcl carlos hoelz ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j el campo ia net ) OR ((( 5 metal complex tran ngoc ) OR ( 0.9 nacl kcl carlos hoelz )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j el campo ia net ) or ((( 5 metal complex tran ngoc ) or ( 0.9 nacl kcl carlos hoelz ))))*.