Talvez deva tentar algumas variações de ortografia:
mongol tonal » mongol son (Expandir a Pesquisa)
east mongol » east ongul (Expandir a Pesquisa), east congo (Expandir a Pesquisa), elso mongol (Expandir a Pesquisa)
tonal noise » local noise (Expandir a Pesquisa), signal noise (Expandir a Pesquisa), global noise (Expandir a Pesquisa)
tail clamp » tail clip (Expandir a Pesquisa), coil clamp (Expandir a Pesquisa)
compl can » comp can (Expandir a Pesquisa), complex can (Expandir a Pesquisa), compl dans (Expandir a Pesquisa)
can non » dan non (Expandir a Pesquisa), than non (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
m tail » m tait (Expandir a Pesquisa), m taib (Expandir a Pesquisa), m tabl (Expandir a Pesquisa)
c east » _ east (Expandir a Pesquisa), c easter (Expandir a Pesquisa)
j noh » _ noh (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 _ compl can non ) OR ((( m tail clamp j noh ) OR ( c east mongol tonal noise ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j _ compl can non ) OR ((( m tail clamp j noh ) OR ( c east mongol tonal noise ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ compl can non ) OR ((( m tail clamp j noh ) OR ( c east mongol tonal noise ))))*.