Talvez deva tentar algumas variações de ortografia:
compound boron » compound common (Expandir a Pesquisa), compound porous (Expandir a Pesquisa), compound strong (Expandir a Pesquisa)
boron ngoc » horn ngoc (Expandir a Pesquisa)
nabf clamp » neff clamp (Expandir a Pesquisa)
j small » 1 small (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
nab amp » ab amp (Expandir a Pesquisa), cab amp (Expandir a Pesquisa), nb amp (Expandir a Pesquisa)
amp can » amp camp (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can new (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
_ nabf » _ nab2 (Expandir a Pesquisa), _ nabh (Expandir a Pesquisa), _ nab3 (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)
_ nab » _ nad (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 small compound boron ngoc ) or ((( _ nabf clamp a now ) or ( _ nab amp can now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j small compound boron ngoc ) OR ((( _ nabf clamp a now ) OR ( _ nab amp can now )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j small compound boron ngoc ) or ((( _ nabf clamp a now ) or ( _ nab amp can now ))))*.