Talvez deva tentar algumas variações de ortografia:
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer can (Expandir a Pesquisa)
natl computer » dal computer (Expandir a Pesquisa), al computer (Expandir a Pesquisa), apl computer (Expandir a Pesquisa)
can never » than never (Expandir a Pesquisa), a never (Expandir a Pesquisa), may never (Expandir a Pesquisa)
dna clamp » a clamp (Expandir a Pesquisa)
clamp per » clamp pcr (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa), clamp p (Expandir a Pesquisa)
per newly » near newly (Expandir a Pesquisa), men newly (Expandir a Pesquisa), our newly (Expandir a Pesquisa)
nat comp » nat comm (Expandir a Pesquisa), et comp (Expandir a Pesquisa), nat cov (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
j natl » j nail (Expandir a Pesquisa), _ natl (Expandir a Pesquisa), j natali (Expandir a Pesquisa)
j nat » j nart (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), a nat (Expandir a Pesquisa)
j dna » _ dna (Expandir a Pesquisa), a dna (Expandir a Pesquisa), 1 dna (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 nat comp can never ) or ( j dna clamp per newly ))) or ( j natl computer case now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( j nat comp can never ) OR ( j dna clamp per newly ))) OR ( j natl computer case now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j nat comp can never ) or ( j dna clamp per newly ))) or ( j natl computer case now ))*.