Talvez deva tentar algumas variações de ortografia:
natl cancer » fatal cancer (Expandir a Pesquisa), anal cancer (Expandir a Pesquisa), al cancer (Expandir a Pesquisa)
cancer inst » cancer instit (Expandir a Pesquisa), cancer inca (Expandir a Pesquisa), cancer against (Expandir a Pesquisa)
nat cancer » rat cancer (Expandir a Pesquisa), eat cancer (Expandir a Pesquisa), fat cancer (Expandir a Pesquisa)
nay cancer » lay cancer (Expandir a Pesquisa), many cancer (Expandir a Pesquisa), daoy cancer (Expandir a Pesquisa)
cancer int » cancer inter (Expandir a Pesquisa), cancer intra (Expandir a Pesquisa), cancer inca (Expandir a Pesquisa)
int monogr » being monogr (Expandir a Pesquisa)
j natl » _ natl (Expandir a Pesquisa), j nail (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
_ nat » _ net (Expandir a Pesquisa), _ nad (Expandir a Pesquisa), _ nac (Expandir a Pesquisa)
j nay » j nagy (Expandir a Pesquisa), _ nay (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 natl cancer inst monogr ) or ( _ nat cancer inst monogr ))) or ( j nay cancer int monogr ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j natl cancer inst monogr ) OR ( _ nat cancer inst monogr ))) OR ( j nay cancer int monogr )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j natl cancer inst monogr ) or ( _ nat cancer inst monogr ))) or ( j nay cancer int monogr ))*.