Talvez deva tentar algumas variações de ortografia:
doses derived » edodes derived (Expandir a Pesquisa), losses derived (Expandir a Pesquisa), bases derived (Expandir a Pesquisa)
derived ther » derived rather (Expandir a Pesquisa), derived three (Expandir a Pesquisa), derived th1 (Expandir a Pesquisa)
level rather » levels rather (Expandir a Pesquisa), level rate (Expandir a Pesquisa), travel rather (Expandir a Pesquisa)
level theory » model theory (Expandir a Pesquisa)
abust level » abuse levels (Expandir a Pesquisa), adult level (Expandir a Pesquisa), best level (Expandir a Pesquisa)
drug doses » drug dose (Expandir a Pesquisa), drug disease (Expandir a Pesquisa)
drug abust » drug abuse (Expandir a Pesquisa), drug abuser (Expandir a Pesquisa), drugs abuse (Expandir a Pesquisa)
drugs does » drugs do (Expandir a Pesquisa), drugs diet (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 doses derived ther ) OR ((( drug abust level rather ) OR ( drugs does level theory ))))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug doses derived ther ) or ((( drug abust level rather ) or ( drugs does level theory ))))*.