Talvez deva tentar algumas variações de ortografia:
dental computer » dental computed (Expandir a Pesquisa), digital computer (Expandir a Pesquisa), annual computer (Expandir a Pesquisa)
computer based » computer aided (Expandir a Pesquisa)
clamp cum » clamp m (Expandir a Pesquisa), clamp can (Expandir a Pesquisa), clamp em (Expandir a Pesquisa)
cum newts » can newts (Expandir a Pesquisa)
based no2 » based non (Expandir a Pesquisa), based noc (Expandir a Pesquisa), based nod (Expandir a Pesquisa)
nat comp » nat comm (Expandir a Pesquisa), et comp (Expandir a Pesquisa), nat cov (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
3 dental » d3 dental (Expandir a Pesquisa), 13 dental (Expandir a Pesquisa), 893 dental (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 nat comp can new ) or ( j _ clamp cum newts ))) or ( 3 dental computer based no2 ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat comp can new ) OR ( j _ clamp cum newts ))) OR ( 3 dental computer based no2 )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat comp can new ) or ( j _ clamp cum newts ))) or ( 3 dental computer based no2 ))*.