Talvez deva tentar algumas variações de ortografia:
clamped grain » clamped drain (Expandir a Pesquisa), clamped rat (Expandir a Pesquisa), clamped snail (Expandir a Pesquisa)
nail clamped » wall clamped (Expandir a Pesquisa), while clamped (Expandir a Pesquisa), a clamped (Expandir a Pesquisa)
coil tran » coil can (Expandir a Pesquisa), coil tag (Expandir a Pesquisa), coil dextran (Expandir a Pesquisa)
natl cam » natl acad (Expandir a Pesquisa), natla sam (Expandir a Pesquisa), nhat cam (Expandir a Pesquisa)
cam than » camp than (Expandir a Pesquisa), cam tuan (Expandir a Pesquisa), cam tran (Expandir a Pesquisa)
e natl » e natal (Expandir a Pesquisa), e nata (Expandir a Pesquisa), _ natl (Expandir a Pesquisa)
j nail » _ nail (Expandir a Pesquisa), a nail (Expandir a Pesquisa), 3 nail (Expandir a Pesquisa)
d coil » dd coil (Expandir a Pesquisa), ed coil (Expandir a Pesquisa), rod coil (Expandir a Pesquisa)
corn » con (Expandir a Pesquisa), core (Expandir a Pesquisa), born (Expandir a Pesquisa)
ngoc » ngo (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: (( e natl cam than non ) or ((( j nail clamped grain (corn OR cord) ) or ( j d coil tran ngoc ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( e natl cam than non ) OR ((( j nail clamped grain (corn OR cord) ) OR ( j d coil tran ngoc )))).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( e natl cam than non ) or ((( j nail clamped grain (corn OR cord) ) or ( j d coil tran ngoc ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( e natl cam than non ) or ((( j nail clamped grain (corn OR cord) ) or ( j d coil tran ngoc ))))*.