Talvez deva tentar algumas variações de ortografia:
disease liver » disease like (Expandir a Pesquisa), disease linked (Expandir a Pesquisa), disease living (Expandir a Pesquisa)
nursery level » nurses level (Expandir a Pesquisa), nurse level (Expandir a Pesquisa), nursery lemon (Expandir a Pesquisa)
drug nursery » drug nurse (Expandir a Pesquisa), fruit nursery (Expandir a Pesquisa), day nursery (Expandir a Pesquisa)
liver ther » liver other (Expandir a Pesquisa), live rather (Expandir a Pesquisa), liver thle2 (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), drugs does (Expandir a Pesquisa), drug dose (Expandir a Pesquisa)
does deep » does sleep (Expandir a Pesquisa), does diet (Expandir a Pesquisa)
deep ther » deep tier (Expandir a Pesquisa), deep than (Expandir a Pesquisa), deep tcr (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 deep ther ) or ((( during disease liver ther ) or ( drug nursery level ther ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug does deep ther ) OR ((( during disease liver ther ) OR ( drug nursery level ther )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug does deep ther ) or ((( during disease liver ther ) or ( drug nursery level ther ))))*.