Talvez deva tentar algumas variações de ortografia:
students computer » student computer (Expandir a Pesquisa), students compared (Expandir a Pesquisa), students competence (Expandir a Pesquisa)
graft compared » grafts compared (Expandir a Pesquisa), grafting compared (Expandir a Pesquisa), graft combined (Expandir a Pesquisa)
j students » _ students (Expandir a Pesquisa), a students (Expandir a Pesquisa), 8 students (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
compr can » comp can (Expandir a Pesquisa), computer can (Expandir a Pesquisa), compared can (Expandir a Pesquisa)
can newts » can new (Expandir a Pesquisa), can newly (Expandir a Pesquisa)
j graft » j grant (Expandir a Pesquisa), j graff (Expandir a Pesquisa), j graf (Expandir a Pesquisa)
j narr » l narr (Expandir a Pesquisa), j nair (Expandir a Pesquisa), j nare (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 students computer _ neto ) or ( j narr compr can newts ))) or ( j graft compared a new ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j students computer _ neto ) OR ( j narr compr can newts ))) OR ( j graft compared a new ))*.