Talvez deva tentar algumas variações de ortografia:
comparing study » comparing student (Expandir a Pesquisa), comparison study (Expandir a Pesquisa), compared study (Expandir a Pesquisa)
gel comparing » al comparing (Expandir a Pesquisa), all comparing (Expandir a Pesquisa), ill comparing (Expandir a Pesquisa)
study ngoc » study non (Expandir a Pesquisa), study nor (Expandir a Pesquisa), study nob (Expandir a Pesquisa)
nayl clamp » tail clamp (Expandir a Pesquisa)
chimp dan » chimp can (Expandir a Pesquisa), shimp dawn (Expandir a Pesquisa)
clamp j » clamp _ (Expandir a Pesquisa)
y chimp » _ chimp (Expandir a Pesquisa), y chimu (Expandir a Pesquisa), y chimo (Expandir a Pesquisa)
dan non » than non (Expandir a Pesquisa), dan ning (Expandir a Pesquisa)
a nayl » a nacl (Expandir a Pesquisa)
j new » a new (Expandir a Pesquisa), _ new (Expandir a Pesquisa), 2 new (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: (( _ gel comparing study ngoc ) or ((( a nayl clamp j new ) or ( j y chimp dan non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ gel comparing study ngoc ) OR ((( a nayl clamp j new ) OR ( j y chimp dan non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ gel comparing study ngoc ) or ((( a nayl clamp j new ) or ( j y chimp dan non ))))*.