Talvez deva tentar algumas variações de ortografia:
levels rather » level rather (Expandir a Pesquisa), cells rather (Expandir a Pesquisa)
doses derived » bases derived (Expandir a Pesquisa), cases derived (Expandir a Pesquisa), doses delivered (Expandir a Pesquisa)
derived ther » derived ether (Expandir a Pesquisa), derived rather (Expandir a Pesquisa), derived three (Expandir a Pesquisa)
level theory » model theory (Expandir a Pesquisa), cell theory (Expandir a Pesquisa)
does levels » does level (Expandir a Pesquisa), ages levels (Expandir a Pesquisa), fos levels (Expandir a Pesquisa)
naive level » five level (Expandir a Pesquisa), live level (Expandir a Pesquisa), negative level (Expandir a Pesquisa)
drug doses » drug dose (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 derived ther ) or ((( drug does levels rather ) or ( drug naive level theory ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug doses derived ther ) OR ((( drug does levels rather ) OR ( drug naive level theory )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug doses derived ther ) or ((( drug does levels rather ) or ( drug naive level theory ))))*.