Talvez deva tentar algumas variações de ortografia:
direct peroral » direct oral (Expandir a Pesquisa)
peroral cause » cerebral cause (Expandir a Pesquisa), central cause (Expandir a Pesquisa), peroral route (Expandir a Pesquisa)
bennett nerve » bennett nee (Expandir a Pesquisa), bennett berger (Expandir a Pesquisa), bennett nemser (Expandir a Pesquisa)
cause does » causes does (Expandir a Pesquisa), cause des (Expandir a Pesquisa), pause does (Expandir a Pesquisa)
beer serve » better serve (Expandir a Pesquisa), speer server (Expandir a Pesquisa)
serve cyst » nerve cyst (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
j direct » j director (Expandir a Pesquisa), nhj direct (Expandir a Pesquisa)
can disc » can dinc (Expandir a Pesquisa), chain disc (Expandir a Pesquisa), can diet (Expandir a Pesquisa)
j beer » j becker (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 direct peroral cause does ) or ((( j bennett nerve can disc ) or ( j beer serve cyst due ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j direct peroral cause does ) OR ((( j bennett nerve can disc ) OR ( j beer serve cyst due )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j direct peroral cause does ) or ((( j bennett nerve can disc ) or ( j beer serve cyst due ))))*.