Talvez deva tentar algumas variações de ortografia:
abnormal copper » abnormal cancer (Expandir a Pesquisa), abnormal color (Expandir a Pesquisa), abnormal corneal (Expandir a Pesquisa)
copper tuyen » copper tube (Expandir a Pesquisa), copper tubes (Expandir a Pesquisa), copper tubing (Expandir a Pesquisa)
2 abnormal » _ abnormal (Expandir a Pesquisa), any abnormal (Expandir a Pesquisa), how abnormal (Expandir a Pesquisa)
tuyen ngoc » nguyen ngoc (Expandir a Pesquisa), tuan ngoc (Expandir a Pesquisa), yen ngoc (Expandir a Pesquisa)
kno carlos » knopf carlos (Expandir a Pesquisa), cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
nacl kno » nacl nano (Expandir a Pesquisa), nacl en (Expandir a Pesquisa), nacl kcl (Expandir a Pesquisa)
c neu » 2 neu (Expandir a Pesquisa)
nunez » nunes (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 a campos c neu ) or ((( 2 abnormal copper tuyen ngoc ) or ( 7.5 nacl kno carlos nunez ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j a campos c neu ) OR ((( 2 abnormal copper tuyen ngoc ) OR ( 7.5 nacl kno carlos nunez )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j a campos c neu ) or ((( 2 abnormal copper tuyen ngoc ) or ( 7.5 nacl kno carlos nunez ))))*.