Talvez deva tentar algumas variações de ortografia:
compared boron » coated boron (Expandir a Pesquisa), combined boron (Expandir a Pesquisa), compared blood (Expandir a Pesquisa)
gelb compared » gel compared (Expandir a Pesquisa), gels compared (Expandir a Pesquisa), b compared (Expandir a Pesquisa)
nagpal clamp » vaginal clamp (Expandir a Pesquisa)
boron ngoc » horn ngoc (Expandir a Pesquisa)
clamp tran » clamp drain (Expandir a Pesquisa), clamp tag (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
j nagpal » _ nagpal (Expandir a Pesquisa), c nagpal (Expandir a Pesquisa), a nagpal (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
j gelb » h gelb (Expandir a Pesquisa), d gelb (Expandir a Pesquisa), w gelb (Expandir a Pesquisa)
j nagy » a nagy (Expandir a Pesquisa), _ nagy (Expandir a Pesquisa)
j now » _ now (Expandir a Pesquisa), a now (Expandir a Pesquisa), i now (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 gelb compared boron ngoc ) OR ((( j nagpal clamp j now ) OR ( j nagy clamp tran ngoc ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j gelb compared boron ngoc ) OR ((( j nagpal clamp j now ) OR ( j nagy clamp tran ngoc ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j gelb compared boron ngoc ) OR ((( j nagpal clamp j now ) OR ( j nagy clamp tran ngoc ))))*.