Talvez deva tentar algumas variações de ortografia:
direct peroral » direct oral (Expandir a Pesquisa)
central nerve » ventral nerve (Expandir a Pesquisa), central nervous (Expandir a Pesquisa), central neural (Expandir a Pesquisa)
peroral cyst » cerebral cyst (Expandir a Pesquisa), cereal cyst (Expandir a Pesquisa), oral cyst (Expandir a Pesquisa)
mehta nerve » mehta nave (Expandir a Pesquisa), mehta nee (Expandir a Pesquisa), mehta neeraj (Expandir a Pesquisa)
nerve cut » nerve cat (Expandir a Pesquisa), nerve cuff (Expandir a Pesquisa), nerve cyst (Expandir a Pesquisa)
j direct » j director (Expandir a Pesquisa), nhj direct (Expandir a Pesquisa)
cut dis » cut disk (Expandir a Pesquisa), cut discs (Expandir a Pesquisa), cut dian (Expandir a Pesquisa)
j mehta » a mehta (Expandir a Pesquisa), _ mehta (Expandir a Pesquisa), k mehta (Expandir a Pesquisa)
cut due » cuti due (Expandir a Pesquisa), gut due (Expandir a Pesquisa), out due (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: (( a central nerve cut dis ) OR ((( j mehta nerve cut due ) OR ( j direct peroral cyst due ))))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a central nerve cut dis ) or ((( j mehta nerve cut due ) or ( j direct peroral cyst due ))))*.