Talvez deva tentar algumas variações de ortografia:
camp ngoc » can ngoc (Expandir a Pesquisa), cao ngoc (Expandir a Pesquisa), lam ngoc (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
cam ngoc » can ngoc (Expandir a Pesquisa), cao ngoc (Expandir a Pesquisa), lam ngoc (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa)
amp can » amp camp (Expandir a Pesquisa)
j naim » _ naim (Expandir a Pesquisa), j nair (Expandir a Pesquisa), a naim (Expandir a Pesquisa)
j nail » _ nail (Expandir a Pesquisa), a nail (Expandir a Pesquisa), 3 nail (Expandir a Pesquisa)
nacl e » nacl en (Expandir a Pesquisa), nacl _ (Expandir a Pesquisa), nacl a (Expandir a Pesquisa)
e camp » e campo (Expandir a Pesquisa), de camp (Expandir a Pesquisa), e camps (Expandir a Pesquisa)
5 amp » _ amp (Expandir a Pesquisa)
a cam » a cat (Expandir a Pesquisa), _ cam (Expandir a Pesquisa), a ca2 (Expandir a Pesquisa)
j 5 » j 65 (Expandir a Pesquisa), j 15 (Expandir a Pesquisa), j 50 (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 5 amp can near ) or ((( ((j naim) OR (j nail)) a cam ngoc ) or ( 3.5 nacl e camp ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j 5 amp can near ) OR ((( ((j naim) OR (j nail)) a cam ngoc ) OR ( 3.5 nacl e camp ngoc )))).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j 5 amp can near ) or ((( ((j naim) OR (j nail)) a cam ngoc ) or ( 3.5 nacl e camp ngoc ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j 5 amp can near ) or ((( ((j naim) OR (j nail)) a cam ngoc ) or ( 3.5 nacl e camp ngoc ))))*.