Talvez deva tentar algumas variações de ortografia:
coated boron » coated iron (Expandir a Pesquisa), coated porous (Expandir a Pesquisa), based boron (Expandir a Pesquisa)
nucl coated » full coated (Expandir a Pesquisa), pcl coated (Expandir a Pesquisa), nickel coated (Expandir a Pesquisa)
boron ngoc » horn ngoc (Expandir a Pesquisa)
nayl clamp » tail clamp (Expandir a Pesquisa)
nay camp » day camp (Expandir a Pesquisa), day camps (Expandir a Pesquisa), gray camp (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
a nucl » a null (Expandir a Pesquisa), 3 nucl (Expandir a Pesquisa), a nuck (Expandir a Pesquisa)
a nayl » a nacl (Expandir a Pesquisa)
camp c » champ c (Expandir a Pesquisa), camp _ (Expandir a Pesquisa), camp a (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)
j nay » j nagy (Expandir a Pesquisa), _ nay (Expandir a Pesquisa)
c now » _ now (Expandir a Pesquisa), c new (Expandir a Pesquisa), c non (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( a nucl coated boron ngoc ) OR ((( a nayl clamp a now ) OR ( j nay camp c now ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a nucl coated boron ngoc ) OR ((( a nayl clamp a now ) OR ( j nay camp c now ))))*.