Talvez deva tentar algumas variações de ortografia:
current observed » currents observed (Expandir a Pesquisa), currents observer (Expandir a Pesquisa), current reserve (Expandir a Pesquisa)
observed system » conserved system (Expandir a Pesquisa), unobserved systems (Expandir a Pesquisa), observing system (Expandir a Pesquisa)
bento nerve » benign nerve (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
bent nerve » absent nerve (Expandir a Pesquisa), mental nerve (Expandir a Pesquisa), dental nerve (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
cat diet » cat diets (Expandir a Pesquisa), fat diet (Expandir a Pesquisa), eat diet (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
i bento » i benito (Expandir a Pesquisa), i benth (Expandir a Pesquisa), i benzo (Expandir a Pesquisa)
j bent » j benet (Expandir a Pesquisa), j bento (Expandir a Pesquisa), j bena (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( i bento nerve cat diet ) OR ( i current observed system dis ))) OR ( j bent nerve case dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i bento nerve cat diet ) or ( i current observed system dis ))) or ( j bent nerve case dis ))*.