Perhaps you should try some spelling variations:
complex cause » complex causes (Expand Search), complex case (Expand Search), complex care (Expand Search)
tail complex » oil complex (Expand Search), atrial complex (Expand Search), basal complex (Expand Search)
gas company » a company (Expand Search), gas companies (Expand Search)
company cas » company case (Expand Search), company cars (Expand Search), company car (Expand Search)
comet mean » comet jean (Expand Search), count mean (Expand Search), cost mean (Expand Search)
all comet » all comer (Expand Search), all come (Expand Search), all comes (Expand Search)
cause now » cause non (Expand Search), cause new (Expand Search), abuse now (Expand Search)
mean new » means new (Expand Search), ocean new (Expand Search)
cas now » case now (Expand Search), has now (Expand Search), cas new (Expand Search)
5 tail » _ tail (Expand Search), a tail (Expand Search), 3 tail (Expand Search)
j all » _ all (Expand Search), b all (Expand Search), j ali (Expand Search)
3 gas » _ gas (Expand Search), a gas (Expand Search), e gas (Expand Search)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( j all comet mean new ) OR ((( 5 tail complex cause now ) OR ( 3 gas company cas now ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j all comet mean new ) or ((( 5 tail complex cause now ) or ( 3 gas company cas now ))))*.