Talvez deva tentar algumas variações de ortografia:
led model » lumped model (Expandir a Pesquisa), lagged model (Expandir a Pesquisa)
model cal » model calm (Expandir a Pesquisa), model can (Expandir a Pesquisa), model car (Expandir a Pesquisa)
art amp » mart amp (Expandir a Pesquisa), arts amp (Expandir a Pesquisa), arte amp (Expandir a Pesquisa)
amp can » amp camp (Expandir a Pesquisa)
can non » dan non (Expandir a Pesquisa), than non (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
cal now » call now (Expandir a Pesquisa), canal now (Expandir a Pesquisa), cell now (Expandir a Pesquisa)
j dnan » _ dnan (Expandir a Pesquisa), j dna (Expandir a Pesquisa), j degnan (Expandir a Pesquisa)
a dnan » a dnab (Expandir a Pesquisa), a dnaj (Expandir a Pesquisa), a dnak (Expandir a Pesquisa)
j none » j noone (Expandir a Pesquisa), _ none (Expandir a Pesquisa), a none (Expandir a Pesquisa)
j art » j arts (Expandir a Pesquisa), j arlt (Expandir a Pesquisa), _ art (Expandir a Pesquisa)
j led » j ledo (Expandir a Pesquisa), j lee (Expandir a Pesquisa), _ led (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: (( j art amp can non ) or ((( ((j dnan) OR (a dnan)) clamp j none ) or ( j led model cal now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j art amp can non ) OR ((( ((j dnan) OR (a dnan)) clamp j none ) OR ( j led model cal now )))).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j art amp can non ) or ((( ((j dnan) OR (a dnan)) clamp j none ) or ( j led model cal now ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j art amp can non ) or ((( ((j dnan) OR (a dnan)) clamp j none ) or ( j led model cal now ))))*.