Talvez deva tentar algumas variações de ortografia:
elderly comparison » elderly compared (Expandir a Pesquisa)
comparison a » comparison _ (Expandir a Pesquisa), comparison among (Expandir a Pesquisa), comparison based (Expandir a Pesquisa)
basal animal » based animal (Expandir a Pesquisa), canal animal (Expandir a Pesquisa), base animal (Expandir a Pesquisa)
all elderly » ill elderly (Expandir a Pesquisa), frail elderly (Expandir a Pesquisa), care elderly (Expandir a Pesquisa)
from cause » from causes (Expandir a Pesquisa), from causal (Expandir a Pesquisa), from cage (Expandir a Pesquisa)
cause new » causes new (Expandir a Pesquisa), use new (Expandir a Pesquisa), cause non (Expandir a Pesquisa)
l3 basal » 3 basal (Expandir a Pesquisa), 239 basal (Expandir a Pesquisa), p53 basal (Expandir a Pesquisa)
animal a » animal _ (Expandir a Pesquisa)
a non » _ non (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 l from cause new ) or ((( all elderly comparison a new ) or ( l3 basal animal a non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l from cause new ) OR ((( all elderly comparison a new ) OR ( l3 basal animal a non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l from cause new ) or ((( all elderly comparison a new ) or ( l3 basal animal a non ))))*.