Talvez deva tentar algumas variações de ortografia:
does developing » cues developing (Expandir a Pesquisa), eyes developing (Expandir a Pesquisa), siloes developing (Expandir a Pesquisa)
developing them » developing other (Expandir a Pesquisa), developing three (Expandir a Pesquisa), developing tree (Expandir a Pesquisa)
drugs does » drugs do (Expandir a Pesquisa)
does liver » does life (Expandir a Pesquisa), does laser (Expandir a Pesquisa), drives liver (Expandir a Pesquisa)
liver over » liver liver (Expandir a Pesquisa), layer over (Expandir a Pesquisa), cover over (Expandir a Pesquisa)
dose level » dose levels (Expandir a Pesquisa), noise level (Expandir a Pesquisa), dose live (Expandir a Pesquisa)
level ther » level theory (Expandir a Pesquisa), level rather (Expandir a Pesquisa), levels other (Expandir a Pesquisa)
drug does » drug doses (Expandir a Pesquisa), drug de (Expandir a Pesquisa), drug diet (Expandir a Pesquisa)
drug dose » drug dosage (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: (( drug does developing them ) OR ((( drugs does liver over ) OR ( drug dose level ther ))))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug does developing them ) or ((( drugs does liver over ) or ( drug dose level ther ))))*.