Talvez deva tentar algumas variações de ortografia:
doses develop » loss develop (Expandir a Pesquisa), models develop (Expandir a Pesquisa), locus develop (Expandir a Pesquisa)
develop them » develop type (Expandir a Pesquisa)
level rather » levels rather (Expandir a Pesquisa), level rate (Expandir a Pesquisa), travel rather (Expandir a Pesquisa)
noise level » noise levels (Expandir a Pesquisa)
more theory » morse theory (Expandir a Pesquisa), pore theory (Expandir a Pesquisa), moral theory (Expandir a Pesquisa)
drug doses » drug dose (Expandir a Pesquisa), drug disease (Expandir a Pesquisa)
drug noise » drug naive (Expandir a Pesquisa), drug nurse (Expandir a Pesquisa), during noise (Expandir a Pesquisa)
drugs does » drugs do (Expandir a Pesquisa), drugs diet (Expandir a Pesquisa)
does more » does mark (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 develop them ) or ((( drug noise level rather ) or ( drugs does more theory ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug doses develop them ) OR ((( drug noise level rather ) OR ( drugs does more theory )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug doses develop them ) or ((( drug noise level rather ) or ( drugs does more theory ))))*.