Talvez deva tentar algumas variações de ortografia:
cancer surveys » cancer surgery (Expandir a Pesquisa), cancer survivors (Expandir a Pesquisa), cancer surgeries (Expandir a Pesquisa)
surveys cyst » surveys cast (Expandir a Pesquisa), surveys case (Expandir a Pesquisa), surveys count (Expandir a Pesquisa)
unal merve » ural merve (Expandir a Pesquisa), unal server (Expandir a Pesquisa), senal merve (Expandir a Pesquisa)
bent serve » best serve (Expandir a Pesquisa), bent nerve (Expandir a Pesquisa), pet serve (Expandir a Pesquisa)
serve cyst » nerve cyst (Expandir a Pesquisa)
02 cancer » 2 cancer (Expandir a Pesquisa), 12 cancer (Expandir a Pesquisa), 32 cancer (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
can tdcs » a tdcs (Expandir a Pesquisa)
i unal » g unal (Expandir a Pesquisa), m unal (Expandir a Pesquisa), a unal (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( 02 cancer surveys cyst due ) OR ( i unal merve can tdcs ))) OR ( j bent serve cyst due ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( 02 cancer surveys cyst due ) OR ( i unal merve can tdcs ))) OR ( j bent serve cyst due ))*.