Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
carlos newton » carlos nelson (Expandir a Pesquisa), santos newton (Expandir a Pesquisa)
complex tuan » complex than (Expandir a Pesquisa), complex tear (Expandir a Pesquisa), complex thin (Expandir a Pesquisa)
nano carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), nuno carlos (Expandir a Pesquisa)
tuan ngoc » tuanh ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), van ngoc (Expandir a Pesquisa)
nacl nano » nacl kno (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa), nacl naoh (Expandir a Pesquisa)
e combs » sex combs (Expandir a Pesquisa)
combs c » combs _ (Expandir a Pesquisa)
5 metal » 5 methyl (Expandir a Pesquisa)
c net » c neto (Expandir a Pesquisa), _ net (Expandir a Pesquisa), u net (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 e combs c net ) or ((( 5 metal complex tuan ngoc ) or ( 3.5 nacl nano carlos newton ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j e combs c net ) OR ((( 5 metal complex tuan ngoc ) OR ( 3.5 nacl nano carlos newton )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e combs c net ) or ((( 5 metal complex tuan ngoc ) or ( 3.5 nacl nano carlos newton ))))*.