Talvez deva tentar algumas variações de ortografia:
absent current » agent current (Expandir a Pesquisa), patient current (Expandir a Pesquisa), abscess current (Expandir a Pesquisa)
current charge » current changes (Expandir a Pesquisa), current care (Expandir a Pesquisa), current large (Expandir a Pesquisa)
central neural » central nepal (Expandir a Pesquisa), central neurons (Expandir a Pesquisa)
neural phase » neural plate (Expandir a Pesquisa), mineral phase (Expandir a Pesquisa), spiral phase (Expandir a Pesquisa)
charge due » charge de (Expandir a Pesquisa), change due (Expandir a Pesquisa), charge du (Expandir a Pesquisa)
17 absent » _ absent (Expandir a Pesquisa), c1 absent (Expandir a Pesquisa), eo absent (Expandir a Pesquisa)
j central » 1hfj central (Expandir a Pesquisa)
phase dis » phase diets (Expandir a Pesquisa), phase does (Expandir a Pesquisa), phase dose (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": "(( 17 absent current charge due ) OR ( j central neural phase dis ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 17 absent current charge due ) OR ( j central neural phase dis ))*.