Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
complex tract » complex trait (Expandir a Pesquisa), complex trace (Expandir a Pesquisa), complex extract (Expandir a Pesquisa)
composta bin » compost bin (Expandir a Pesquisa), composta en (Expandir a Pesquisa), compostas bi (Expandir a Pesquisa)
carlos noel » carlos joel (Expandir a Pesquisa), carlos noe (Expandir a Pesquisa), carlos yoel (Expandir a Pesquisa)
l composta » la composta (Expandir a Pesquisa), y composta (Expandir a Pesquisa), e composta (Expandir a Pesquisa)
tract ngoc » tran ngoc (Expandir a Pesquisa), thach ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa)
bin need » babin need (Expandir a Pesquisa), bin saeed (Expandir a Pesquisa), pain need (Expandir a Pesquisa)
e metal » e metas (Expandir a Pesquisa), e meta (Expandir a Pesquisa), e metanol (Expandir a Pesquisa)
7.5 nac » 7.5 nacl (Expandir a Pesquisa), 3.5 nacl (Expandir a Pesquisa)
nac y » nac _ (Expandir a Pesquisa), nic y (Expandir a Pesquisa), mac y (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 l composta bin need ) OR ((( e metal complex tract ngoc ) OR ( 7.5 nac y carlos noel ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l composta bin need ) OR ((( e metal complex tract ngoc ) OR ( 7.5 nac y carlos noel ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l composta bin need ) OR ((( e metal complex tract ngoc ) OR ( 7.5 nac y carlos noel ))))*.