Talvez deva tentar algumas variações de ortografia:
survey system » surgery system (Expandir a Pesquisa), prey system (Expandir a Pesquisa), grey system (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
ac current » c current (Expandir a Pesquisa), dc current (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system dds (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
del nerve » duel nerve (Expandir a Pesquisa), del nervo (Expandir a Pesquisa), model nerve (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)
j del » y del (Expandir a Pesquisa), m del (Expandir a Pesquisa), _ del (Expandir a Pesquisa)
a dos » a dog (Expandir a Pesquisa), e dos (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: (( ac current survey system dis ) or ((( j del nerve system dis ) or ( j bent nerve a dos ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( ac current survey system dis ) OR ((( j del nerve system dis ) OR ( j bent nerve a dos )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( ac current survey system dis ) or ((( j del nerve system dis ) or ( j bent nerve a dos ))))*.