Talvez deva tentar algumas variações de ortografia:
comparing causal » comparing caudal (Expandir a Pesquisa), comparing basal (Expandir a Pesquisa), comparing nasal (Expandir a Pesquisa)
computer costs » computer codes (Expandir a Pesquisa), computer tests (Expandir a Pesquisa), computer courses (Expandir a Pesquisa)
cost computer » joint computer (Expandir a Pesquisa), about computer (Expandir a Pesquisa), ut computer (Expandir a Pesquisa)
nat comparing » fat comparing (Expandir a Pesquisa), dast comparing (Expandir a Pesquisa), last comparing (Expandir a Pesquisa)
causal new » causal de (Expandir a Pesquisa), causal del (Expandir a Pesquisa), causal en (Expandir a Pesquisa)
costs new » hosts new (Expandir a Pesquisa), tests new (Expandir a Pesquisa)
al amr » al amri (Expandir a Pesquisa), al amro (Expandir a Pesquisa), al amer (Expandir a Pesquisa)
j cost » j costa (Expandir a Pesquisa), j coast (Expandir a Pesquisa), j colt (Expandir a Pesquisa)
e nat » e nata (Expandir a Pesquisa), e nao (Expandir a Pesquisa), e nas (Expandir a Pesquisa)
j al » j a (Expandir a Pesquisa), j l (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 al amr can new ) or ( j cost computer costs new ))) or ( e nat comparing causal new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j al amr can new ) OR ( j cost computer costs new ))) OR ( e nat comparing causal new )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j al amr can new ) or ( j cost computer costs new ))) or ( e nat comparing causal new ))*.