Talvez deva tentar algumas variações de ortografia:
reserve system » research system (Expandir a Pesquisa), research systems (Expandir a Pesquisa)
absent reserve » absent presence (Expandir a Pesquisa), absent nerve (Expandir a Pesquisa), absent presences (Expandir a Pesquisa)
bent reserve » debt reserve (Expandir a Pesquisa), men reserve (Expandir a Pesquisa), bank reserve (Expandir a Pesquisa)
benign nevus » benign nevi (Expandir a Pesquisa), benign cells (Expandir a Pesquisa), benign neck (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system di (Expandir a Pesquisa), system das (Expandir a Pesquisa)
_ absent » _ absence (Expandir a Pesquisa)
a benign » _ benign (Expandir a Pesquisa)
nevus a » nevus _ (Expandir a Pesquisa)
a dis » a disc (Expandir a Pesquisa), a dos (Expandir a Pesquisa), a des (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: (( a bent reserve system dis ) or ((( _ absent reserve system dis ) or ( a benign nevus a dis ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a bent reserve system dis ) OR ((( _ absent reserve system dis ) OR ( a benign nevus a dis )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a bent reserve system dis ) or ((( _ absent reserve system dis ) or ( a benign nevus a dis ))))*.