Talvez deva tentar algumas variações de ortografia:
central research » dental research (Expandir a Pesquisa), general research (Expandir a Pesquisa), centred research (Expandir a Pesquisa)
research systems » research synthesis (Expandir a Pesquisa)
ventral nerve » femoral nerve (Expandir a Pesquisa)
letter nerve » letter nurse (Expandir a Pesquisa), matter nerve (Expandir a Pesquisa), letter nervous (Expandir a Pesquisa)
systems di » systems do (Expandir a Pesquisa), systems de (Expandir a Pesquisa), systems d (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
i ventral » ii ventral (Expandir a Pesquisa), _ ventral (Expandir a Pesquisa), a ventral (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
j letter » bj letter (Expandir a Pesquisa), cj letter (Expandir a Pesquisa), j letters (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat diet (Expandir a Pesquisa)
nerve c » nerve cn (Expandir a Pesquisa), nerve _ (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
c disc » c disch (Expandir a Pesquisa), isc disc (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 letter nerve cat dis ) or ( i ventral nerve c disc ))) or ( j central research systems di ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j letter nerve cat dis ) OR ( i ventral nerve c disc ))) OR ( j central research systems di )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j letter nerve cat dis ) or ( i ventral nerve c disc ))) or ( j central research systems di ))*.