Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex trace » complex traces (Expandir a Pesquisa), complexed trace (Expandir a Pesquisa), complete trace (Expandir a Pesquisa)
coombs jana » coombs wanda (Expandir a Pesquisa), coombs ian (Expandir a Pesquisa), coombs jason (Expandir a Pesquisa)
carlos jara » carlos lara (Expandir a Pesquisa), carlos carla (Expandir a Pesquisa), carlos juca (Expandir a Pesquisa)
trace ngoc » tran ngoc (Expandir a Pesquisa), thach ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa)
kno carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), pino carlos (Expandir a Pesquisa)
nacl kno » nacl nano (Expandir a Pesquisa), nacl en (Expandir a Pesquisa), nacl kcl (Expandir a Pesquisa)
5 metal » 5 methyl (Expandir a Pesquisa)
jana n » jana _ (Expandir a Pesquisa), jana a (Expandir a Pesquisa), jana b (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 _ coombs jana n ) or ((( 5 metal complex trace ngoc ) or ( 3.5 nacl kno carlos jara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ coombs jana n ) OR ((( 5 metal complex trace ngoc ) OR ( 3.5 nacl kno carlos jara )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ coombs jana n ) or ((( 5 metal complex trace ngoc ) or ( 3.5 nacl kno carlos jara ))))*.