Talvez deva tentar algumas variações de ortografia:
compound class » compound glass (Expandir a Pesquisa), compound classes (Expandir a Pesquisa), compound can (Expandir a Pesquisa)
class ngos » class nos (Expandir a Pesquisa), class non (Expandir a Pesquisa), class nov (Expandir a Pesquisa)
nail clamp » nail lamp (Expandir a Pesquisa), tail clamp (Expandir a Pesquisa), coil clamp (Expandir a Pesquisa)
can ngosa » can ngos (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa), can ngs (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
j nail » _ nail (Expandir a Pesquisa), a nail (Expandir a Pesquisa), 3 nail (Expandir a Pesquisa)
j none » j noone (Expandir a Pesquisa), _ none (Expandir a Pesquisa), a none (Expandir a Pesquisa)
j gram » j gray (Expandir a Pesquisa), j gran (Expandir a Pesquisa), j graf (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: (( a small compound class ngos ) or ((( j nail clamp j none ) or ( j gram comp can ngosa ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a small compound class ngos ) OR ((( j nail clamp j none ) OR ( j gram comp can ngosa )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a small compound class ngos ) or ((( j nail clamp j none ) or ( j gram comp can ngosa ))))*.