Talvez deva tentar algumas variações de ortografia:
coulter pulse » counter pulse (Expandir a Pesquisa), alter pulse (Expandir a Pesquisa), chapter pulse (Expandir a Pesquisa)
pulse system » purpose system (Expandir a Pesquisa), base system (Expandir a Pesquisa), nose system (Expandir a Pesquisa)
mental nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa), renal 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), beta driven (Expandir a Pesquisa), beta drives (Expandir a Pesquisa)
_ coulter » _ counter (Expandir a Pesquisa)
j mental » j mengual (Expandir a Pesquisa), j mehta (Expandir a Pesquisa), j mena (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
j bet » j beth (Expandir a Pesquisa), j beta (Expandir a Pesquisa), j bett (Expandir a Pesquisa)
a dis » a disc (Expandir a Pesquisa), a dos (Expandir a Pesquisa), a des (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 ( _ coulter pulse system des ))) or ( j mental nerve a dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j bet drive system des ) OR ( _ coulter pulse system des ))) OR ( j mental nerve a dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j bet drive system des ) or ( _ coulter pulse system des ))) or ( j mental nerve a dis ))*.