Talvez deva tentar algumas variações de ortografia:
counter based » center based (Expandir a Pesquisa), count based (Expandir a Pesquisa), country based (Expandir a Pesquisa)
ii counter » iii counter (Expandir a Pesquisa), i counter (Expandir a Pesquisa), its counter (Expandir a Pesquisa)
clamp can » clamp a (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
nat comp » nat comm (Expandir a Pesquisa), et comp (Expandir a Pesquisa), nat cov (Expandir a Pesquisa)
la neuro » a neuro (Expandir a Pesquisa), la negra (Expandir a Pesquisa), la neuve (Expandir a Pesquisa)
a clamp » _ clamp (Expandir a Pesquisa), c clamp (Expandir a Pesquisa), a claims (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), a nat (Expandir a Pesquisa)
d ii » d i (Expandir a Pesquisa), _ ii (Expandir a Pesquisa), i ii (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat comp la neuro ) OR ( j a clamp can new ))) OR ( d ii counter based now ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat comp la neuro ) or ( j a clamp can new ))) or ( d ii counter based now ))*.