Talvez deva tentar algumas variações de ortografia:
model compound » model compounds (Expandir a Pesquisa), novel compound (Expandir a Pesquisa)
compound than » compounds than (Expandir a Pesquisa), compound tan (Expandir a Pesquisa), compound thin (Expandir a Pesquisa)
a computer » _ computer (Expandir a Pesquisa)
computer a » computer _ (Expandir a Pesquisa)
nat clamp » dnan clamp (Expandir a Pesquisa), a clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa)
clamp ar » clamp a (Expandir a Pesquisa), clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
j model » j modolo (Expandir a Pesquisa), j monder (Expandir a Pesquisa)
ar new » war new (Expandir a Pesquisa), bar new (Expandir a Pesquisa), ear new (Expandir a Pesquisa)
a non » _ non (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), a nat (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 computer a non ) or ( j model compound than non ))) or ( j nat clamp ar new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j a computer a non ) OR ( j model compound than non ))) OR ( j nat clamp ar new )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j a computer a non ) or ( j model compound than non ))) or ( j nat clamp ar new ))*.