Talvez deva tentar algumas variações de ortografia:
disease liver » disease like (Expandir a Pesquisa), disease linked (Expandir a Pesquisa), disease living (Expandir a Pesquisa)
does develop » boys develop (Expandir a Pesquisa), loss develop (Expandir a Pesquisa), does developing (Expandir a Pesquisa)
develop them » develop type (Expandir a Pesquisa)
drug disease » during disease (Expandir a Pesquisa), drug release (Expandir a Pesquisa)
level rather » levels rather (Expandir a Pesquisa), level rate (Expandir a Pesquisa), travel rather (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (( drug does develop them ) or ((( drug disease liver ther ) or ( drug noise level rather ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug does develop them ) OR ((( drug disease liver ther ) OR ( drug noise level rather )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug does develop them ) or ((( drug disease liver ther ) or ( drug noise level rather ))))*.