Talvez deva tentar algumas variações de ortografia:
level rather » levels rather (Expandir a Pesquisa), level rate (Expandir a Pesquisa), level race (Expandir a Pesquisa)
during noisy » during noise (Expandir a Pesquisa), using noisy (Expandir a Pesquisa), during non (Expandir a Pesquisa)
level theory » legal theory (Expandir a Pesquisa), model theory (Expandir a Pesquisa)
doses level » dose level (Expandir a Pesquisa), does level (Expandir a Pesquisa), dose levels (Expandir a Pesquisa)
liver thle2 » liver three (Expandir a Pesquisa)
noisy level » noise level (Expandir a Pesquisa), noise levels (Expandir a Pesquisa), noisy label (Expandir a Pesquisa)
drug doses » drug dose (Expandir a Pesquisa), drug disease (Expandir a Pesquisa)
does liver » does life (Expandir a Pesquisa), does laser (Expandir a Pesquisa), drives liver (Expandir a Pesquisa)
drug does » drugs does (Expandir a Pesquisa), drug dose (Expandir a Pesquisa), drug de (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 doses level rather ) or ((( drug does liver thle2 ) or ( during noisy level theory ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug doses level rather ) OR ((( drug does liver thle2 ) OR ( during noisy level theory )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug doses level rather ) or ((( drug does liver thle2 ) or ( during noisy level theory ))))*.