Talvez deva tentar algumas variações de ortografia:
reacting systems » heating systems (Expandir a Pesquisa), reaction systems (Expandir a Pesquisa), rearing systems (Expandir a Pesquisa)
absent reacting » absent tracing (Expandir a Pesquisa), absent reduction (Expandir a Pesquisa)
mental nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
systems di » systems doi (Expandir a Pesquisa), systems do (Expandir a Pesquisa), systems de (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa), nerve cut (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)
j cent » a cent (Expandir a Pesquisa), i cent (Expandir a Pesquisa), j center (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 cent nerve cat due ) or ((( j mental nerve cat due ) or ( _ absent reacting systems di ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j cent nerve cat due ) OR ((( j mental nerve cat due ) OR ( _ absent reacting systems di )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j cent nerve cat due ) or ((( j mental nerve cat due ) or ( _ absent reacting systems di ))))*.