Talvez deva tentar algumas variações de ortografia:
comparison case » comparison based (Expandir a Pesquisa), comparison a (Expandir a Pesquisa), comparison data (Expandir a Pesquisa)
acido compared » acid compared (Expandir a Pesquisa), acids compared (Expandir a Pesquisa), bcid2 compared (Expandir a Pesquisa)
oil companies » _ companies (Expandir a Pesquisa), oil company (Expandir a Pesquisa)
companies cut » companies act (Expandir a Pesquisa), companies can (Expandir a Pesquisa), companies case (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
a acido » de acido (Expandir a Pesquisa), el acido (Expandir a Pesquisa), co acido (Expandir a Pesquisa)
cut now » cut new (Expandir a Pesquisa), gut now (Expandir a Pesquisa), out now (Expandir a Pesquisa)
3 oil » 3 oils (Expandir a Pesquisa), _ oil (Expandir a Pesquisa), l oil (Expandir a Pesquisa)
3 its » _ its (Expandir a Pesquisa), i its (Expandir a Pesquisa), a its (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: (( a acido compared _ netw ) or ((( 3 oil companies cut now ) or ( 3 its comparison case now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a acido compared _ netw ) OR ((( 3 oil companies cut now ) OR ( 3 its comparison case now )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a acido compared _ netw ) or ((( 3 oil companies cut now ) or ( 3 its comparison case now ))))*.