Talvez deva tentar algumas variações de ortografia:
sense develop » gene develop (Expandir a Pesquisa), disease develop (Expandir a Pesquisa), bse develop (Expandir a Pesquisa)
develop them » develop type (Expandir a Pesquisa), develop age (Expandir a Pesquisa)
level theory » model theory (Expandir a Pesquisa), cell theory (Expandir a Pesquisa)
laser other » laser ther (Expandir a Pesquisa), paper other (Expandir a Pesquisa), laser over (Expandir a Pesquisa)
noise level » noise levels (Expandir a Pesquisa)
drug sense » drug sensor (Expandir a Pesquisa), drug scene (Expandir a Pesquisa), drug sends (Expandir a Pesquisa)
does laser » does liver (Expandir a Pesquisa), does lateral (Expandir a Pesquisa)
drug noise » drug naive (Expandir a Pesquisa), drug nurse (Expandir a Pesquisa), during noise (Expandir a Pesquisa)
drug does » drug doses (Expandir a Pesquisa), drugs does (Expandir a Pesquisa), drug dose (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 sense develop them ) or ((( drug does laser other ) or ( drug noise level theory ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug sense develop them ) OR ((( drug does laser other ) OR ( drug noise level theory )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug sense develop them ) or ((( drug does laser other ) or ( drug noise level theory ))))*.