Talvez deva tentar algumas variações de ortografia:
pulse system » purpose system (Expandir a Pesquisa), base system (Expandir a Pesquisa), nose system (Expandir a Pesquisa)
center pulse » counter pulse (Expandir a Pesquisa), center phase (Expandir a Pesquisa), inter pulse (Expandir a Pesquisa)
cent drive » test drive (Expandir a Pesquisa), belt drive (Expandir a Pesquisa), bet drive (Expandir a Pesquisa)
system des » system der (Expandir a Pesquisa), system de (Expandir a Pesquisa), system design (Expandir a Pesquisa)
bena nerve » beta nerve (Expandir a Pesquisa), bent nerve (Expandir a Pesquisa), renal nerve (Expandir a Pesquisa)
nerve cyst » nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa), nerve system (Expandir a Pesquisa)
j center » j centner (Expandir a Pesquisa), _ center (Expandir a Pesquisa), a center (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa)
j cent » a cent (Expandir a Pesquisa), i cent (Expandir a Pesquisa)
j bena » j bela (Expandir a Pesquisa), j bent (Expandir a Pesquisa), j benham (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 cent drive system des ) or ( j center pulse system des ))) or ( j bena nerve cyst dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j cent drive system des ) OR ( j center pulse system des ))) OR ( j bena nerve cyst dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j cent drive system des ) or ( j center pulse system des ))) or ( j bena nerve cyst dis ))*.