Talvez deva tentar algumas variações de ortografia:
elderly compared » elderly care (Expandir a Pesquisa)
compared cases » compared case (Expandir a Pesquisa), collared cases (Expandir a Pesquisa), compares bases (Expandir a Pesquisa)
do elderly » _ elderly (Expandir a Pesquisa), from elderly (Expandir a Pesquisa)
nasal comp » nasal com (Expandir a Pesquisa), nasal como (Expandir a Pesquisa), nasal cpap (Expandir a Pesquisa)
comp tran » comp trad (Expandir a Pesquisa), pomp trap (Expandir a Pesquisa)
camp can » clamp can (Expandir a Pesquisa), camp ca (Expandir a Pesquisa), amp can (Expandir a Pesquisa)
el camp » el campo (Expandir a Pesquisa), del camp (Expandir a Pesquisa), el cap (Expandir a Pesquisa)
can net » can new (Expandir a Pesquisa), dan net (Expandir a Pesquisa), can nt (Expandir a Pesquisa)
3 nasal » 3d nasal (Expandir a Pesquisa), 31 nasal (Expandir a Pesquisa), _ nasal (Expandir a Pesquisa)
j el » j l (Expandir a Pesquisa), j e (Expandir a Pesquisa), j et (Expandir a Pesquisa)
ngoc » ngo (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 el camp can net ) or ((( do elderly compared cases new ) or ( 3 nasal comp tran ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j el camp can net ) OR ((( do elderly compared cases new ) OR ( 3 nasal comp tran ngoc )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j el camp can net ) or ((( do elderly compared cases new ) or ( 3 nasal comp tran ngoc ))))*.