Talvez deva tentar algumas variações de ortografia:
pulse system » base system (Expandir a Pesquisa), case system (Expandir a Pesquisa), dose system (Expandir a Pesquisa)
finger pulse » finger paul (Expandir a Pesquisa)
denham nerve » dental nerve (Expandir a Pesquisa), dental nerves (Expandir a Pesquisa), dentin nerve (Expandir a Pesquisa)
system des » system der (Expandir a Pesquisa), system de (Expandir a Pesquisa), system design (Expandir a Pesquisa)
bet drive » belt drive (Expandir a Pesquisa), bet driven (Expandir a Pesquisa), met drive (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa)
2 finger » h2 finger (Expandir a Pesquisa), _ finger (Expandir a Pesquisa), a finger (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat bias (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 des ) OR ( 2 finger pulse system des ))) OR ( d denham nerve cat dis ))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j bet drive system des ) OR ( 2 finger pulse system des ))) OR ( d denham nerve cat dis ))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j bet drive system des ) OR ( 2 finger pulse system des ))) OR ( d denham nerve cat dis ))*.