Talvez deva tentar algumas variações de ortografia:
compsany causes » company case (Expandir a Pesquisa), company uses (Expandir a Pesquisa), competing causes (Expandir a Pesquisa)
snail1 complex » snai1 complex (Expandir a Pesquisa), snail complex (Expandir a Pesquisa), snails complex (Expandir a Pesquisa)
oil compsany » oil company (Expandir a Pesquisa), oil compound (Expandir a Pesquisa), oil compact (Expandir a Pesquisa)
campo con » campo como (Expandir a Pesquisa), campo c (Expandir a Pesquisa)
5 snail1 » _ snail1 (Expandir a Pesquisa), a snail1 (Expandir a Pesquisa), b snail1 (Expandir a Pesquisa)
case now » cases now (Expandir a Pesquisa), case non (Expandir a Pesquisa), case new (Expandir a Pesquisa)
l campo » el campo (Expandir a Pesquisa), al campo (Expandir a Pesquisa), l campos (Expandir a Pesquisa)
con net » con nee (Expandir a Pesquisa), non net (Expandir a Pesquisa), upon net (Expandir a Pesquisa)
3 oil » 3 oils (Expandir a Pesquisa), _ oil (Expandir a Pesquisa), l oil (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j l campo con net ) OR ((( 5 snail1 complex case now ) OR ( 3 oil compsany causes non ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l campo con net ) OR ((( 5 snail1 complex case now ) OR ( 3 oil compsany causes non ))))*.