Talvez deva tentar algumas variações de ortografia:
currently active » currently inactive (Expandir a Pesquisa), current active (Expandir a Pesquisa), currents active (Expandir a Pesquisa)
crestr nerve » crest nerve (Expandir a Pesquisa), greater nerve (Expandir a Pesquisa)
active cas9 » active case (Expandir a Pesquisa), inactive cas9 (Expandir a Pesquisa), active cases (Expandir a Pesquisa)
case does » cases does (Expandir a Pesquisa), cause does (Expandir a Pesquisa), case goes (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
cas9 dis » cas9 dsbs (Expandir a Pesquisa), cas9 dna (Expandir a Pesquisa), cas9 do (Expandir a Pesquisa)
i crestr » i crispr (Expandir a Pesquisa), i crespo (Expandir a Pesquisa), i create (Expandir a Pesquisa)
can tdcs » a tdcs (Expandir a Pesquisa)
j beta » j beth (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": "(((( _ currently active cas9 dis ) OR ( i crestr nerve case does ))) OR ( j beta nerve can tdcs ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( _ currently active cas9 dis ) OR ( i crestr nerve case does ))) OR ( j beta nerve can tdcs ))*.