Talvez deva tentar algumas variações de ortografia:
cobalt complex » cobalt complexes (Expandir a Pesquisa)
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
complex than » complex trait (Expandir a Pesquisa)
carlos nojek » carlos nunez (Expandir a Pesquisa), carlos nunes (Expandir a Pesquisa), carlos nejar (Expandir a Pesquisa)
kcl carlos » kuhl carlos (Expandir a Pesquisa), gil carlos (Expandir a Pesquisa), l carlos (Expandir a Pesquisa)
l cooper » _ cooper (Expandir a Pesquisa), i cooper (Expandir a Pesquisa), j cooper (Expandir a Pesquisa)
a cobalt » _ cobalt (Expandir a Pesquisa)
0.9 nac » 0.9 nacl (Expandir a Pesquisa)
nac kcl » nacl kcl (Expandir a Pesquisa)
than o » ethan o (Expandir a Pesquisa), than oo (Expandir a Pesquisa), than o1 (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 cooper jason _ ) or ((( a cobalt complex than o ) or ( 0.9 nac kcl carlos nojek ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l cooper jason _ ) OR ((( a cobalt complex than o ) OR ( 0.9 nac kcl carlos nojek )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l cooper jason _ ) or ((( a cobalt complex than o ) or ( 0.9 nac kcl carlos nojek ))))*.