Talvez deva tentar algumas variações de ortografia:
current curves » current curve (Expandir a Pesquisa), current surveys (Expandir a Pesquisa), current survey (Expandir a Pesquisa)
neural causes » natural causes (Expandir a Pesquisa), neural changes (Expandir a Pesquisa), neurons causes (Expandir a Pesquisa)
eye affected » eyes affected (Expandir a Pesquisa), dye affected (Expandir a Pesquisa), were affected (Expandir a Pesquisa)
eye affect » eye effect (Expandir a Pesquisa), gene affect (Expandir a Pesquisa), eye effects (Expandir a Pesquisa)
causes dis » causes disk (Expandir a Pesquisa), causes des (Expandir a Pesquisa), causes dose (Expandir a Pesquisa)
j current » j currently (Expandir a Pesquisa), j curran (Expandir a Pesquisa), j currell (Expandir a Pesquisa)
curves do » curvas do (Expandir a Pesquisa), curves due (Expandir a Pesquisa), curves how (Expandir a Pesquisa)
do de » do dr (Expandir a Pesquisa), do ce (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 current curves do de ) OR ( ((eye affect) OR (eye affected)) neural causes dis ))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j current curves do de ) or ( ((eye affect) OR (eye affected)) neural causes dis ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j current curves do de ) or ( ((eye affect) OR (eye affected)) neural causes dis ))*.