Talvez deva tentar algumas variações de ortografia:
driven system » drive system (Expandir a Pesquisa), drive systems (Expandir a Pesquisa)
center pulse » counter pulse (Expandir a Pesquisa), center phase (Expandir a Pesquisa), inter pulse (Expandir a Pesquisa)
pulse system » phase system (Expandir a Pesquisa), purpose system (Expandir a Pesquisa), base system (Expandir a Pesquisa)
beta driven » metal driven (Expandir a Pesquisa), theta driven (Expandir a Pesquisa), data driven (Expandir a Pesquisa)
system des » system der (Expandir a Pesquisa), system de (Expandir a Pesquisa), system design (Expandir a Pesquisa)
deal nerve » dual nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa), dermal nerve (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), _ center (Expandir a Pesquisa), a center (Expandir a Pesquisa)
cat dis » cat diets (Expandir a Pesquisa), cat diet (Expandir a Pesquisa)
j beta » j beth (Expandir a Pesquisa)
j deal » j dean (Expandir a Pesquisa), j dell (Expandir a Pesquisa), j deml (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 beta driven system des ) OR ( j center pulse system des ))) OR ( j deal nerve cat dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j beta driven system des ) or ( j center pulse system des ))) or ( j deal nerve cat dis ))*.