Talvez deva tentar algumas variações de ortografia:
cancer index » cancer induced (Expandir a Pesquisa), cancer induces (Expandir a Pesquisa)
index monogr » index motor (Expandir a Pesquisa), index monitor (Expandir a Pesquisa), index among (Expandir a Pesquisa)
natl cancer » nasal cancer (Expandir a Pesquisa), anal cancer (Expandir a Pesquisa), al cancer (Expandir a Pesquisa)
beat cancer » beam cancer (Expandir a Pesquisa), breast cancer (Expandir a Pesquisa), treat cancer (Expandir a Pesquisa)
nat cancer » rat cancer (Expandir a Pesquisa), eat cancer (Expandir a Pesquisa), fat cancer (Expandir a Pesquisa)
cancer int » cancer inca (Expandir a Pesquisa)
int monogr » being monogr (Expandir a Pesquisa)
j beat » j beaty (Expandir a Pesquisa), j bean (Expandir a Pesquisa), j bear (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), e nat (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: (( _ natl cancer index monogr ) or ((( j nat cancer int monogr ) or ( j beat cancer int monogr ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ natl cancer index monogr ) OR ((( j nat cancer int monogr ) OR ( j beat cancer int monogr )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ natl cancer index monogr ) or ((( j nat cancer int monogr ) or ( j beat cancer int monogr ))))*.