Talvez deva tentar algumas variações de ortografia:
complex trang » complex trans (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex than (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
compost en » composta en (Expandir a Pesquisa), compost when (Expandir a Pesquisa), compost tea (Expandir a Pesquisa)
trang ngoc » tran ngoc (Expandir a Pesquisa), trong ngoc (Expandir a Pesquisa), tang ngoc (Expandir a Pesquisa)
gum carlos » baum carlos (Expandir a Pesquisa), geam carlos (Expandir a Pesquisa), ruam carlos (Expandir a Pesquisa)
carlos noe » carlos noel (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa), carlos nojek (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
nacl gum » nacl em (Expandir a Pesquisa), nacl un (Expandir a Pesquisa)
5 metal » 5 methyl (Expandir a Pesquisa)
en nie » wen nie (Expandir a Pesquisa), jen nie (Expandir a Pesquisa), ben nie (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 _ compost en nie ) or ((( 5 metal complex trang ngoc ) or ( 7.5 nacl gum carlos noe ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ compost en nie ) OR ((( 5 metal complex trang ngoc ) OR ( 7.5 nacl gum carlos noe )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ compost en nie ) or ((( 5 metal complex trang ngoc ) or ( 7.5 nacl gum carlos noe ))))*.