Talvez deva tentar algumas variações de ortografia:
carlos romero » carlos roberto (Expandir a Pesquisa)
complex train » complex strain (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex brain (Expandir a Pesquisa)
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
coat complex » cobalt complex (Expandir a Pesquisa), joint complex (Expandir a Pesquisa), covalent complex (Expandir a Pesquisa)
train flows » trade flows (Expandir a Pesquisa), train low (Expandir a Pesquisa), grain flow (Expandir a Pesquisa)
kno carlos » knopf carlos (Expandir a Pesquisa), cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa)
i cooper » _ cooper (Expandir a Pesquisa)
nacl kno » nacl nano (Expandir a Pesquisa), nacl en (Expandir a Pesquisa), nacl kcl (Expandir a Pesquisa)
jason a » jason _ (Expandir a Pesquisa)
5 coat » _ coat (Expandir a Pesquisa), a coat (Expandir a Pesquisa), 1 coat (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 i cooper jason a ) or ((( 5 coat complex train flows ) or ( 0.9 nacl kno carlos romero ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j i cooper jason a ) OR ((( 5 coat complex train flows ) OR ( 0.9 nacl kno carlos romero )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j i cooper jason a ) or ((( 5 coat complex train flows ) or ( 0.9 nacl kno carlos romero ))))*.