Talvez deva tentar algumas variações de ortografia:
lists develop » lions develop (Expandir a Pesquisa), loss develop (Expandir a Pesquisa), rats develop (Expandir a Pesquisa)
develop them » develop type (Expandir a Pesquisa), develop age (Expandir a Pesquisa)
level theory » legal theory (Expandir a Pesquisa), model theory (Expandir a Pesquisa)
drug lists » drug list (Expandir a Pesquisa), drug costs (Expandir a Pesquisa), drug tests (Expandir a Pesquisa)
does liver » does life (Expandir a Pesquisa), does laser (Expandir a Pesquisa), drives liver (Expandir a Pesquisa)
liver ther » liver other (Expandir a Pesquisa), live rather (Expandir a Pesquisa), liver thle2 (Expandir a Pesquisa)
drug noise » drug naive (Expandir a Pesquisa), drug nurse (Expandir a Pesquisa), during noise (Expandir a Pesquisa)
drug does » drug doses (Expandir a Pesquisa), drugs does (Expandir a Pesquisa), drug dose (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 lists develop them ) OR ((( drug does liver ther ) OR ( drug noise level theory ))))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug lists develop them ) or ((( drug does liver ther ) or ( drug noise level theory ))))*.