Talvez deva tentar algumas variações de ortografia:
comparing exposure » compound exposure (Expandir a Pesquisa)
what computers » how computers (Expandir a Pesquisa), iet computers (Expandir a Pesquisa), can computers (Expandir a Pesquisa)
computers can » computers a (Expandir a Pesquisa), computers _ (Expandir a Pesquisa)
rat comparing » rate comparing (Expandir a Pesquisa), rct comparing (Expandir a Pesquisa), fat comparing (Expandir a Pesquisa)
computer can » computer case (Expandir a Pesquisa), computer a (Expandir a Pesquisa), computer code (Expandir a Pesquisa)
exposure new » exposure near (Expandir a Pesquisa), exposure sex (Expandir a Pesquisa)
i computer » ii computer (Expandir a Pesquisa), pi computer (Expandir a Pesquisa), _ computer (Expandir a Pesquisa)
can now » can new (Expandir a Pesquisa), can non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
j what » rj what (Expandir a Pesquisa), _ what (Expandir a Pesquisa), a what (Expandir a Pesquisa)
j rat » j rath (Expandir a Pesquisa), _ rat (Expandir a Pesquisa), a rat (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 what computers can now ) or ( _ i computer can now ))) or ( j rat comparing exposure new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j what computers can now ) OR ( _ i computer can now ))) OR ( j rat comparing exposure new )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j what computers can now ) or ( _ i computer can now ))) or ( j rat comparing exposure new ))*.