Talvez deva tentar algumas variações de ortografia:
direct nerve » direct energy (Expandir a Pesquisa), direct neural (Expandir a Pesquisa)
spinal nerve » retinal nerve (Expandir a Pesquisa)
absence five » absence like (Expandir a Pesquisa), absence active (Expandir a Pesquisa), absentees five (Expandir a Pesquisa)
five cystic » ovine cystic (Expandir a Pesquisa)
nerve cyst » nerve cystic (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve cat (Expandir a Pesquisa)
cystic dis » cystic ducts (Expandir a Pesquisa)
ai direct » i direct (Expandir a Pesquisa), ii direct (Expandir a Pesquisa), ci direct (Expandir a Pesquisa)
j spinal » 2 spinal (Expandir a Pesquisa), j spina (Expandir a Pesquisa), 0 spinal (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa), cyst d (Expandir a Pesquisa), cyst dna (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: (( ai direct nerve _ dis ) or ((( j spinal nerve cyst dis ) or ( _ absence five cystic dis ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( ai direct nerve _ dis ) OR ((( j spinal nerve cyst dis ) OR ( _ absence five cystic dis )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( ai direct nerve _ dis ) or ((( j spinal nerve cyst dis ) or ( _ absence five cystic dis ))))*.