Talvez deva tentar algumas variações de ortografia:
nuclear roles » nuclear role (Expandir a Pesquisa), nuclear rnas (Expandir a Pesquisa), nuclear re (Expandir a Pesquisa)
31 nuclear » 31p nuclear (Expandir a Pesquisa), 1 nuclear (Expandir a Pesquisa), 13c nuclear (Expandir a Pesquisa)
role con » roles con (Expandir a Pesquisa), role can (Expandir a Pesquisa), role do (Expandir a Pesquisa)
con netw » con net (Expandir a Pesquisa), con nee (Expandir a Pesquisa), soc netw (Expandir a Pesquisa)
roles do » roles de (Expandir a Pesquisa), roles del (Expandir a Pesquisa), roles _ (Expandir a Pesquisa)
oil com » oil co (Expandir a Pesquisa), oil con (Expandir a Pesquisa), oil crop (Expandir a Pesquisa)
l role » l rose (Expandir a Pesquisa), l robles (Expandir a Pesquisa)
do noe » do nome (Expandir a Pesquisa), do none (Expandir a Pesquisa), do nove (Expandir a Pesquisa)
5 oil » _ oil (Expandir a Pesquisa), 5 il (Expandir a Pesquisa), l oil (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 role con netw ) or ((( 5 oil com a new ) or ( 31 nuclear roles do noe ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l role con netw ) OR ((( 5 oil com a new ) OR ( 31 nuclear roles do noe ))))*.