Talvez deva tentar algumas variações de ortografia:
east congo » fast congo (Expandir a Pesquisa), east mongol (Expandir a Pesquisa), west congo (Expandir a Pesquisa)
congo cal » congo cas (Expandir a Pesquisa), congo scale (Expandir a Pesquisa), congo care (Expandir a Pesquisa)
rat hiv » nat hiv (Expandir a Pesquisa), tat hiv (Expandir a Pesquisa), treat hiv (Expandir a Pesquisa)
rat hev » rat head (Expandir a Pesquisa), rat heat (Expandir a Pesquisa), rat have (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
cal now » call now (Expandir a Pesquisa), canal now (Expandir a Pesquisa), cell now (Expandir a Pesquisa)
a nacl » _ nacl (Expandir a Pesquisa), m nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
j east » _ east (Expandir a Pesquisa), c east (Expandir a Pesquisa), a east (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 ((rat hiv) OR (rat hev)) can now ) or ((( a nacl clamp j noh ) or ( j east congo cal now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j ((rat hiv) OR (rat hev)) can now ) OR ((( a nacl clamp j noh ) OR ( j east congo cal now )))).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j ((rat hiv) OR (rat hev)) can now ) or ((( a nacl clamp j noh ) or ( j east congo cal now ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j ((rat hiv) OR (rat hev)) can now ) or ((( a nacl clamp j noh ) or ( j east congo cal now ))))*.