Talvez deva tentar algumas variações de ortografia:
counter pulse » counter public (Expandir a Pesquisa), inter pulse (Expandir a Pesquisa), under pulse (Expandir a Pesquisa)
pulse system » phase system (Expandir a Pesquisa), purpose system (Expandir a Pesquisa), base system (Expandir a Pesquisa)
dental nerve » mental nerve (Expandir a Pesquisa), ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
bet drive » belt drive (Expandir a Pesquisa), belt drives (Expandir a Pesquisa), beta driven (Expandir a Pesquisa)
j counter » _ counter (Expandir a Pesquisa), a counter (Expandir a Pesquisa), j coulter (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
j dental » j delta (Expandir a Pesquisa), j deal (Expandir a Pesquisa), j denham (Expandir a Pesquisa)
cat dis » cat diets (Expandir a Pesquisa), cat diet (Expandir a Pesquisa)
j bet » j beth (Expandir a Pesquisa), j beta (Expandir a Pesquisa), j bett (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 bet drive system der ) or ( j counter pulse system der ))) or ( j dental nerve cat dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j bet drive system der ) OR ( j counter pulse system der ))) OR ( j dental nerve cat dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j bet drive system der ) or ( j counter pulse system der ))) or ( j dental nerve cat dis ))*.