Talvez deva tentar algumas variações de ortografia:
current surgery » recurrent surgery (Expandir a Pesquisa), urgent surgery (Expandir a Pesquisa), current survey (Expandir a Pesquisa)
surgery system » surgery systematic (Expandir a Pesquisa)
mental nerve » ventral nerve (Expandir a Pesquisa)
renal nerve » retinal nerve (Expandir a Pesquisa), cranial nerve (Expandir a Pesquisa), spinal nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
j mental » j mengual (Expandir a Pesquisa), j mehta (Expandir a Pesquisa), j mena (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
i renal » i real (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve _ (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
c diet » c dietz (Expandir a Pesquisa), c diez (Expandir a Pesquisa), c dieb (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: (((( i renal nerve c diet ) OR ( i current surgery system dis ))) OR ( j mental nerve case dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i renal nerve c diet ) or ( i current surgery system dis ))) or ( j mental nerve case dis ))*.