Talvez deva tentar algumas variações de ortografia:
ethics easton » ethics eastern (Expandir a Pesquisa), ethics past (Expandir a Pesquisa)
ethics post » ethics lost (Expandir a Pesquisa), ethics cost (Expandir a Pesquisa), ethics past (Expandir a Pesquisa)
need ethics » based ethics (Expandir a Pesquisa)
ethics east » ethics past (Expandir a Pesquisa), ethics case (Expandir a Pesquisa), ethics art (Expandir a Pesquisa)
med ethics » media ethics (Expandir a Pesquisa), old ethics (Expandir a Pesquisa), did ethics (Expandir a Pesquisa)
easton m.d » heuston m.d (Expandir a Pesquisa), marston m.d (Expandir a Pesquisa), easton d (Expandir a Pesquisa)
east named » east james (Expandir a Pesquisa), last name (Expandir a Pesquisa), last names (Expandir a Pesquisa)
post m.d » post m.c (Expandir a Pesquisa), post md (Expandir a Pesquisa), post m.j (Expandir a Pesquisa)
j need » _ need (Expandir a Pesquisa), a need (Expandir a Pesquisa), j neep (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( j med ethics easton m.d ) OR ( j med ethics post m.d ))) OR ( j need ethics east named ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j med ethics easton m.d ) OR ( j med ethics post m.d ))) OR ( j need ethics east named ))*.