Talvez deva tentar algumas variações de ortografia:
congo van » congo fan (Expandir a Pesquisa), cong van (Expandir a Pesquisa), congo dans (Expandir a Pesquisa)
art congo » east congo (Expandir a Pesquisa), fast congo (Expandir a Pesquisa), haut congo (Expandir a Pesquisa)
can ngoc » tran ngoc (Expandir a Pesquisa), phan ngoc (Expandir a Pesquisa), bao ngoc (Expandir a Pesquisa)
van ngoc » tran ngoc (Expandir a Pesquisa), vu ngoc (Expandir a Pesquisa), bao ngoc (Expandir a Pesquisa)
mat amp » mat amin (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa)
a clamp » _ clamp (Expandir a Pesquisa), c clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
j non » _ non (Expandir a Pesquisa), a non (Expandir a Pesquisa), i non (Expandir a Pesquisa)
j art » j arts (Expandir a Pesquisa), j arlt (Expandir a Pesquisa), _ art (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: (( _ mat amp ((can now) or (can ngoc)) ) or ((( j a clamp j non ) or ( j art congo van ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ mat amp ((can now) OR (can ngoc)) ) OR ((( j a clamp j non ) OR ( j art congo van ngoc )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ mat amp ((can now) or (can ngoc)) ) or ((( j a clamp j non ) or ( j art congo van ngoc ))))*.