Talvez deva tentar algumas variações de ortografia:
graft compared » grafting compared (Expandir a Pesquisa), graft combined (Expandir a Pesquisa)
compared cases » compared case (Expandir a Pesquisa), collared cases (Expandir a Pesquisa), compares bases (Expandir a Pesquisa)
pcr compared » pcr coupled (Expandir a Pesquisa), pcr combined (Expandir a Pesquisa)
compared law » compared a (Expandir a Pesquisa), compared _ (Expandir a Pesquisa), company law (Expandir a Pesquisa)
ct computer » cat computer (Expandir a Pesquisa), ut computer (Expandir a Pesquisa), ct computed (Expandir a Pesquisa)
aided snow » aided sensor (Expandir a Pesquisa), gridded snow (Expandir a Pesquisa)
j graft » j grant (Expandir a Pesquisa), j graff (Expandir a Pesquisa), j graf (Expandir a Pesquisa)
law non » law note (Expandir a Pesquisa), thaw non (Expandir a Pesquisa)
j pcr » _ pcr (Expandir a Pesquisa), a pcr (Expandir a Pesquisa), q pcr (Expandir a Pesquisa)
j ct » j c (Expandir a Pesquisa), j st (Expandir a Pesquisa), j et (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 ct computer aided snow ) or ((( j graft compared cases new ) or ( j pcr compared law non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j ct computer aided snow ) OR ((( j graft compared cases new ) OR ( j pcr compared law non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j ct computer aided snow ) or ((( j graft compared cases new ) or ( j pcr compared law non ))))*.