Talvez deva tentar algumas variações de ortografia:
asian children » african children (Expandir a Pesquisa), iranian children (Expandir a Pesquisa), italian children (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
children 2 » children _ (Expandir a Pesquisa), children a (Expandir a Pesquisa), children 6 (Expandir a Pesquisa)
3 metal » 3 methyl (Expandir a Pesquisa)
_ keila » _ keita (Expandir a Pesquisa), _ keil (Expandir a Pesquisa), _ keilani (Expandir a Pesquisa)
keila m » keila e (Expandir a Pesquisa), keila n (Expandir a Pesquisa), keila _ (Expandir a Pesquisa)
yu ngoc » vu ngoc (Expandir a Pesquisa), du ngoc (Expandir a Pesquisa), tu ngoc (Expandir a Pesquisa)
c non » _ non (Expandir a Pesquisa), i non (Expandir a Pesquisa), 1 non (Expandir a Pesquisa)
a non » _ non (Expandir a Pesquisa)
m yu » m y (Expandir a Pesquisa), _ yu (Expandir a Pesquisa), a yu (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 _ asian children 2 ) or ((( 3 metal complex ((c non) or (a non)) ) or ( _ keila m yu ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ asian children 2 ) OR ((( 3 metal complex ((c non) OR (a non)) ) OR ( _ keila m yu ngoc )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ asian children 2 ) or ((( 3 metal complex ((c non) or (a non)) ) or ( _ keila m yu ngoc ))))*.