Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex thai » complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex tear (Expandir a Pesquisa)
caso4 carlos » caso carlos (Expandir a Pesquisa), caro carlos (Expandir a Pesquisa), casal carlos (Expandir a Pesquisa)
combs anion » combs brandon (Expandir a Pesquisa), combs allison (Expandir a Pesquisa), combs daniel (Expandir a Pesquisa)
carlos nova » carlos novoa (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa)
nacl caso4 » nacl na2so4 (Expandir a Pesquisa)
anion ni2 » anion na (Expandir a Pesquisa), anion net (Expandir a Pesquisa), ion ni2 (Expandir a Pesquisa)
thai ngoc » thi ngoc (Expandir a Pesquisa)
5 metal » 5 methyl (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 anion ni2 ) or ((( 5 metal complex thai ngoc ) or ( 0.9 nacl caso4 carlos nova ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combs anion ni2 ) OR ((( 5 metal complex thai ngoc ) OR ( 0.9 nacl caso4 carlos nova ))))*.