Talvez deva tentar algumas variações de ortografia:
tool compound » thiol compounds (Expandir a Pesquisa), novel compound (Expandir a Pesquisa), model compound (Expandir a Pesquisa)
nair compared » nail compared (Expandir a Pesquisa), nails compared (Expandir a Pesquisa), nmr compared (Expandir a Pesquisa)
natl compare » rate compare (Expandir a Pesquisa), data compare (Expandir a Pesquisa), rats compare (Expandir a Pesquisa)
compared can » compared case (Expandir a Pesquisa), compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa)
compound can » compounds can (Expandir a Pesquisa), compound c (Expandir a Pesquisa), compound cue (Expandir a Pesquisa)
compare a » compare _ (Expandir a Pesquisa)
can non » dan non (Expandir a Pesquisa), than non (Expandir a Pesquisa), can ngoc (Expandir a Pesquisa)
23 tool » 2 tool (Expandir a Pesquisa), a3 tool (Expandir a Pesquisa), v3 tool (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: (( _ natl compare a new ) or ((( v nair compared can non ) or ( 23 tool compound can non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( _ natl compare a new ) OR ((( v nair compared can non ) OR ( 23 tool compound can non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( _ natl compare a new ) or ((( v nair compared can non ) or ( 23 tool compound can non ))))*.