Talvez deva tentar algumas variações de ortografia:
ethical committees » ethics committees (Expandir a Pesquisa), ethics committee (Expandir a Pesquisa), technical committee (Expandir a Pesquisa)
committees based » committees banec (Expandir a Pesquisa), commitment based (Expandir a Pesquisa), committees have (Expandir a Pesquisa)
tavi compared » saving compared (Expandir a Pesquisa), care compared (Expandir a Pesquisa), mri compared (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
j ethical » i ethical (Expandir a Pesquisa), m ethical (Expandir a Pesquisa), ubj ethical (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
amp can » amp camp (Expandir a Pesquisa)
j tavi » _ tavi (Expandir a Pesquisa), 3 tavi (Expandir a Pesquisa), a tavi (Expandir a Pesquisa)
l amp » _ amp (Expandir a Pesquisa), 5 amp (Expandir a Pesquisa), r amp (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j tavi compared _ neto ) OR ( j l amp can newts ))) OR ( j ethical committees based now ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j tavi compared _ neto ) or ( j l amp can newts ))) or ( j ethical committees based now ))*.