Talvez deva tentar algumas variações de ortografia:
current cancer » recurrent cancer (Expandir a Pesquisa), current concerns (Expandir a Pesquisa), current concept (Expandir a Pesquisa)
cancer casts » cancer cases (Expandir a Pesquisa), cancer costs (Expandir a Pesquisa), cancer causes (Expandir a Pesquisa)
benito nerve » benign nerve (Expandir a Pesquisa), benito narvaez (Expandir a Pesquisa), benito eva (Expandir a Pesquisa)
cancer can » cancer care (Expandir a Pesquisa), cancer case (Expandir a Pesquisa), cancer cases (Expandir a Pesquisa)
j current » j currently (Expandir a Pesquisa), ac current (Expandir a Pesquisa), j curran (Expandir a Pesquisa)
casts due » cases due (Expandir a Pesquisa), costs due (Expandir a Pesquisa), cats due (Expandir a Pesquisa)
j benito » j benitez (Expandir a Pesquisa)
case dos » case does (Expandir a Pesquisa), case dose (Expandir a Pesquisa), cases dos (Expandir a Pesquisa)
can dcs » can tdcs (Expandir a Pesquisa), can dce (Expandir a Pesquisa), can dags (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 current cancer can dcs ) or ( i current cancer casts due ))) or ( j benito nerve case dos ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j current cancer can dcs ) OR ( i current cancer casts due ))) OR ( j benito nerve case dos )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j current cancer can dcs ) or ( i current cancer casts due ))) or ( j benito nerve case dos ))*.