Talvez deva tentar algumas variações de ortografia:
computer models » computer model (Expandir a Pesquisa), computer modeling (Expandir a Pesquisa), computer modelling (Expandir a Pesquisa)
call computer » small computer (Expandir a Pesquisa), scale computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa)
models now » models know (Expandir a Pesquisa), models new (Expandir a Pesquisa), modern now (Expandir a Pesquisa)
natl comp » al comp (Expandir a Pesquisa), natalia comp (Expandir a Pesquisa)
camp can » clamp can (Expandir a Pesquisa), camp ca (Expandir a Pesquisa), amp can (Expandir a Pesquisa)
can netw » can new (Expandir a Pesquisa), can net (Expandir a Pesquisa), can newts (Expandir a Pesquisa)
comp can » chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa), comp la (Expandir a Pesquisa)
ac camp » c camp (Expandir a Pesquisa), amp camp (Expandir a Pesquisa), day camp (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can new (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j natl » j nail (Expandir a Pesquisa), _ natl (Expandir a Pesquisa), j nat (Expandir a Pesquisa)
j call » j calle (Expandir a Pesquisa), j calls (Expandir a Pesquisa), j calu (Expandir a Pesquisa)
j ac » j a (Expandir a Pesquisa), j c (Expandir a Pesquisa), j al (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j ac camp can netw ) OR ((( j natl comp can now ) OR ( j call computer models now ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j ac camp can netw ) OR ((( j natl comp can now ) OR ( j call computer models now ))))*.