Talvez deva tentar algumas variações de ortografia:
absent native » present native (Expandir a Pesquisa), absent nails (Expandir a Pesquisa), absent nerve (Expandir a Pesquisa)
centner nerve » central nerve (Expandir a Pesquisa), cancer nerve (Expandir a Pesquisa), letter nerve (Expandir a Pesquisa)
center nurse » center nurses (Expandir a Pesquisa), letter nurse (Expandir a Pesquisa), cancer nurse (Expandir a Pesquisa)
nerve system » nervous system (Expandir a Pesquisa), reserve system (Expandir a Pesquisa), drive system (Expandir a Pesquisa)
native cas9 » native case (Expandir a Pesquisa), inactive cas9 (Expandir a Pesquisa), native class (Expandir a Pesquisa)
nurse case » nurse care (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system di (Expandir a Pesquisa), system das (Expandir a Pesquisa)
j centner » m centner (Expandir a Pesquisa), _ entner (Expandir a Pesquisa), _ gentner (Expandir a Pesquisa)
j center » _ center (Expandir a Pesquisa), a center (Expandir a Pesquisa), 2 center (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
l absent » _ absent (Expandir a Pesquisa), 17 absent (Expandir a Pesquisa), c1 absent (Expandir a Pesquisa)
cas9 dis » cas9 dsbs (Expandir a Pesquisa), cas9 dna (Expandir a Pesquisa), cas9 do (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 center nurse case dis ) or ( j centner nerve system dis ))) or ( l absent native cas9 dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j center nurse case dis ) OR ( j centner nerve system dis ))) OR ( l absent native cas9 dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j center nurse case dis ) or ( j centner nerve system dis ))) or ( l absent native cas9 dis ))*.