Talvez deva tentar algumas variações de ortografia:
level catheter » novel catheter (Expandir a Pesquisa), vessel catheter (Expandir a Pesquisa), local catheter (Expandir a Pesquisa)
level theory » model theory (Expandir a Pesquisa), cell theory (Expandir a Pesquisa)
olive rather » live rather (Expandir a Pesquisa), olive rachel (Expandir a Pesquisa), naive rather (Expandir a Pesquisa)
dose level » dose levels (Expandir a Pesquisa), noise level (Expandir a Pesquisa), dose live (Expandir a Pesquisa)
does olive » does live (Expandir a Pesquisa), does online (Expandir a Pesquisa), gomes olive (Expandir a Pesquisa)
five level » five novel (Expandir a Pesquisa)
drug dose » drug dosage (Expandir a Pesquisa)
drug does » drug doses (Expandir a Pesquisa), drugs does (Expandir a Pesquisa), drug de (Expandir a Pesquisa)
drug five » drugs five (Expandir a Pesquisa), drug file (Expandir a Pesquisa), drug naive (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 dose level theory ) or ((( drug does olive rather ) or ( drug five level catheter ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug dose level theory ) OR ((( drug does olive rather ) OR ( drug five level catheter )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug dose level theory ) or ((( drug does olive rather ) or ( drug five level catheter ))))*.