Talvez deva tentar algumas variações de ortografia:
dna clamp » a clamp (Expandir a Pesquisa)
clamp par » clamp ar (Expandir a Pesquisa), clamp pcr (Expandir a Pesquisa), clamp a (Expandir a Pesquisa)
can ngoc » tran ngoc (Expandir a Pesquisa), phan ngoc (Expandir a Pesquisa), bao ngoc (Expandir a Pesquisa)
comb van » comb jean (Expandir a Pesquisa), rob van (Expandir a Pesquisa), job van (Expandir a Pesquisa)
van ngoc » tran ngoc (Expandir a Pesquisa), vu ngoc (Expandir a Pesquisa), bao ngoc (Expandir a Pesquisa)
cpt amp » cpt camp (Expandir a Pesquisa), cnt amp (Expandir a Pesquisa), citt amp (Expandir a Pesquisa)
can now » can non (Expandir a Pesquisa), can new (Expandir a Pesquisa)
par nos » para nos (Expandir a Pesquisa), mar nos (Expandir a Pesquisa), ar nos (Expandir a Pesquisa)
et comb » et com (Expandir a Pesquisa), et comp (Expandir a Pesquisa), et comme (Expandir a Pesquisa)
8 cpt » _ cpt (Expandir a Pesquisa), i cpt (Expandir a Pesquisa)
j dna » _ dna (Expandir a Pesquisa), a dna (Expandir a Pesquisa), 1 dna (Expandir a Pesquisa)
j et » j e (Expandir a Pesquisa), j st (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: (( 8 cpt amp ((can now) OR (can ngoc)) ) or ((( j dna clamp par nos ) or ( j et comb van ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 8 cpt amp ((can now) OR (can ngoc)) ) OR ((( j dna clamp par nos ) OR ( j et comb van ngoc )))).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( 8 cpt amp ((can now) OR (can ngoc)) ) or ((( j dna clamp par nos ) or ( j et comb van ngoc ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 8 cpt amp ((can now) OR (can ngoc)) ) or ((( j dna clamp par nos ) or ( j et comb van ngoc ))))*.