Talvez deva tentar algumas variações de ortografia:
derived three » derived free (Expandir a Pesquisa), derived type (Expandir a Pesquisa)
doses derived » edodes derived (Expandir a Pesquisa), losses derived (Expandir a Pesquisa), bases derived (Expandir a Pesquisa)
does devel » does level (Expandir a Pesquisa), does novel (Expandir a Pesquisa)
drugs does » drugs do (Expandir a Pesquisa), drugs diet (Expandir a Pesquisa)
devel ther » novel ther (Expandir a Pesquisa), level theory (Expandir a Pesquisa), develop them (Expandir a Pesquisa)
drug doses » drug dose (Expandir a Pesquisa), drug disease (Expandir a Pesquisa)
drug does » drug dose (Expandir a Pesquisa), drug de (Expandir a Pesquisa), drug diet (Expandir a Pesquisa)
does deep » does sleep (Expandir a Pesquisa)
deep ther » deep than (Expandir a Pesquisa), deep tcr (Expandir a Pesquisa), deep ten (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 deep ther ) OR ( drugs does devel ther ))) OR ( drug doses derived three ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( drug does deep ther ) or ( drugs does devel ther ))) or ( drug doses derived three ))*.