Talvez deva tentar algumas variações de ortografia:
east congo » fast congo (Expandir a Pesquisa), east mongol (Expandir a Pesquisa), west congo (Expandir a Pesquisa)
a nucleo » al nucleo (Expandir a Pesquisa), ao nucleo (Expandir a Pesquisa), a nucleos (Expandir a Pesquisa)
congo el » congo del (Expandir a Pesquisa), congo e (Expandir a Pesquisa), congo et (Expandir a Pesquisa)
nat gas » net gas (Expandir a Pesquisa), fast gas (Expandir a Pesquisa), east gas (Expandir a Pesquisa)
gas dan » gas da (Expandir a Pesquisa), ias dan (Expandir a Pesquisa), mas dan (Expandir a Pesquisa)
dan non » than non (Expandir a Pesquisa), dan ning (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
3 nucl » 3 null (Expandir a Pesquisa)
a east » ga east (Expandir a Pesquisa), _ east (Expandir a Pesquisa), a easy (Expandir a Pesquisa)
el nou » el nour (Expandir a Pesquisa), el noa (Expandir a Pesquisa), el non (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (Expandir a Pesquisa)
j noh » _ noh (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 nat gas dan non ) or ((( ((a nucleo) or (3 nucl)) clamp j noh ) or ( a east congo el nou ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j nat gas dan non ) OR ((( ((a nucleo) OR (3 nucl)) clamp j noh ) OR ( a east congo el nou )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j nat gas dan non ) or ((( ((a nucleo) or (3 nucl)) clamp j noh ) or ( a east congo el nou ))))*.