Talvez deva tentar algumas variações de ortografia:
dnan clamp » dna clamp (Expandir a Pesquisa), dna clamps (Expandir a Pesquisa), can clamp (Expandir a Pesquisa)
chip can » chip a (Expandir a Pesquisa), chip ce (Expandir a Pesquisa), chip c (Expandir a Pesquisa)
hip can » pip can (Expandir a Pesquisa), tip can (Expandir a Pesquisa), hip case (Expandir a Pesquisa)
clamp a » clamp _ (Expandir a Pesquisa), clamp j (Expandir a Pesquisa)
et comb » et com (Expandir a Pesquisa), et comp (Expandir a Pesquisa), et comme (Expandir a Pesquisa)
j dnan » _ dnan (Expandir a Pesquisa), j dna (Expandir a Pesquisa), a dnan (Expandir a Pesquisa)
comb n » comb _ (Expandir a Pesquisa), comb m (Expandir a Pesquisa), comb nov (Expandir a Pesquisa)
n ngoc » _ ngoc (Expandir a Pesquisa), b ngoc (Expandir a Pesquisa), d ngoc (Expandir a Pesquisa)
2 nat » 2 nat2 (Expandir a Pesquisa), _ nat (Expandir a Pesquisa), 2 nad (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: (( 2 nat ((chip can) or (hip can)) new ) or ((( j dnan clamp a new ) or ( j et comb n ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 2 nat ((chip can) OR (hip can)) new ) OR ((( j dnan clamp a new ) OR ( j et comb n ngoc )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 2 nat ((chip can) or (hip can)) new ) or ((( j dnan clamp a new ) or ( j et comb n ngoc ))))*.