Talvez deva tentar algumas variações de ortografia:
dnan clamp » dna clamp (Expandir a Pesquisa), dna clamps (Expandir a Pesquisa), can clamp (Expandir a Pesquisa)
cancel non » cancer none (Expandir a Pesquisa), cancers non (Expandir a Pesquisa), cancer's non (Expandir a Pesquisa)
cancer non » cancer new (Expandir a Pesquisa), cancer na (Expandir a Pesquisa), cancer nci (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
j fath » j fathi (Expandir a Pesquisa), _ fath (Expandir a Pesquisa), m fath (Expandir a Pesquisa)
fath i » nath i (Expandir a Pesquisa), fath a (Expandir a Pesquisa), fath m (Expandir a Pesquisa)
_ dnan » _ dnak (Expandir a Pesquisa), _ dnaa (Expandir a Pesquisa), _ dnaj (Expandir a Pesquisa)
i can » _ can (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)
et xv » et xve (Expandir a Pesquisa), et xvi (Expandir a Pesquisa)
j et » j e (Expandir a Pesquisa), j st (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 fath i can new ) or ((( _ dnan clamp a now ) or ( j et xv ((cancel non) OR (cancer non)) ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j fath i can new ) OR ((( _ dnan clamp a now ) OR ( j et xv ((cancel non) OR (cancer non)) ))))*.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j fath i can new ) or ((( _ dnan clamp a now ) or ( j et xv ((cancel non) OR (cancer non)) ))))*".