Talvez deva tentar algumas variações de ortografia:
ethics whittle » ethics whistle (Expandir a Pesquisa)
need ethics » based ethics (Expandir a Pesquisa)
ethics hist » ethics history (Expandir a Pesquisa), ethics whistle (Expandir a Pesquisa), ethics honest (Expandir a Pesquisa)
ethics cist » ethics cost (Expandir a Pesquisa), ethics case (Expandir a Pesquisa), ethics ciba (Expandir a Pesquisa)
med ethics » media ethics (Expandir a Pesquisa), old ethics (Expandir a Pesquisa), did ethics (Expandir a Pesquisa)
whittle e » whittle b (Expandir a Pesquisa), whittle c (Expandir a Pesquisa), whittle h (Expandir a Pesquisa)
j need » j neep (Expandir a Pesquisa), j neel (Expandir a Pesquisa), j nees (Expandir a Pesquisa)
hist e » heist e (Expandir a Pesquisa), wist e (Expandir a Pesquisa), rist e (Expandir a Pesquisa)
cist e » cist _ (Expandir a Pesquisa)
j med » _ med (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 need ethics hist e ) OR ( j need ethics cist e ))) or ( j med ethics whittle e ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j need ethics hist e ) OR ( j need ethics cist e ))) OR ( j med ethics whittle e )).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j need ethics hist e ) OR ( j need ethics cist e ))) or ( j med ethics whittle e ))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j need ethics hist e ) OR ( j need ethics cist e ))) or ( j med ethics whittle e ))*.