Talvez deva tentar algumas variações de ortografia:
active systems » active systemic (Expandir a Pesquisa), adaptive systems (Expandir a Pesquisa), drive systems (Expandir a Pesquisa)
absent active » absent native (Expandir a Pesquisa)
prevent nerve » prevents nerve (Expandir a Pesquisa), prevent neural (Expandir a Pesquisa), prevent new (Expandir a Pesquisa)
mental nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
systems dcs » systems dacs (Expandir a Pesquisa), systems dss (Expandir a Pesquisa), systems dds (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
j mental » j mengual (Expandir a Pesquisa), j mena (Expandir a Pesquisa), j mehta (Expandir a Pesquisa)
_ absent » _ absence (Expandir a Pesquisa)
can due » scan due (Expandir a Pesquisa), man due (Expandir a Pesquisa), can de (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: (( _ prevent nerve can due ) or ((( j mental nerve can due ) or ( _ absent active systems dcs ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ prevent nerve can due ) OR ((( j mental nerve can due ) OR ( _ absent active systems dcs )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ prevent nerve can due ) or ((( j mental nerve can due ) or ( _ absent active systems dcs ))))*.