Talvez deva tentar algumas variações de ortografia:
crispr serve » crisis serve (Expandir a Pesquisa), crispr derived (Expandir a Pesquisa), crispr seroseq (Expandir a Pesquisa)
crespo serve » crespo servan (Expandir a Pesquisa), crespo sergio (Expandir a Pesquisa), crespo hervas (Expandir a Pesquisa)
serve system » server system (Expandir a Pesquisa), nerve system (Expandir a Pesquisa), servo system (Expandir a Pesquisa)
bent serve » best serve (Expandir a Pesquisa), bent nerve (Expandir a Pesquisa), stent serve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system dds (Expandir a Pesquisa)
serve cat » nerve cat (Expandir a Pesquisa), serve a (Expandir a Pesquisa), service cats (Expandir a Pesquisa)
c crespo » a crespo (Expandir a Pesquisa), d crespo (Expandir a Pesquisa), _ crespo (Expandir a Pesquisa)
i crispr » ii crispr (Expandir a Pesquisa), _ crispr (Expandir a Pesquisa), a crispr (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat bias (Expandir a Pesquisa)
serve c » serve _ (Expandir a Pesquisa), serve a (Expandir a Pesquisa), serve w (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)
c dis » c dias (Expandir a Pesquisa), c disc (Expandir a Pesquisa), c dos (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: (((( c crespo serve cat dis ) or ( i crispr serve c dis ))) or ( j bent serve system dis ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( c crespo serve cat dis ) OR ( i crispr serve c dis ))) OR ( j bent serve system dis )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( c crespo serve cat dis ) or ( i crispr serve c dis ))) or ( j bent serve system dis ))*.