Talvez deva tentar algumas variações de ortografia:
vital computer » virtual computer (Expandir a Pesquisa), visual computer (Expandir a Pesquisa), virtual coomputer (Expandir a Pesquisa)
natural copper » natural cover (Expandir a Pesquisa), natural upper (Expandir a Pesquisa), natural complex (Expandir a Pesquisa)
computer based » computer aided (Expandir a Pesquisa)
copper can » copper clad (Expandir a Pesquisa), copper cast (Expandir a Pesquisa), copper case (Expandir a Pesquisa)
e natural » e naturali (Expandir a Pesquisa), e naturais (Expandir a Pesquisa)
based new » based next (Expandir a Pesquisa), based near (Expandir a Pesquisa), based n (Expandir a Pesquisa)
e vital » de vital (Expandir a Pesquisa), e vita (Expandir a Pesquisa), use vital (Expandir a Pesquisa)
a nair » a nail (Expandir a Pesquisa)
compr » comer (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: (( a nair compr cac netw ) or ((( e natural copper can new ) or ( e vital computer based new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a nair compr cac netw ) OR ((( e natural copper can new ) OR ( e vital computer based new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a nair compr cac netw ) or ((( e natural copper can new ) or ( e vital computer based new ))))*.