Perhaps you should try some spelling variations:
computer's can » computers can (Expand Search), computer can (Expand Search), computers can't (Expand Search)
nac56 complex » nav1.6 complex (Expand Search), smc6 complex (Expand Search), nsp16 complex (Expand Search)
a computer's » a composer's (Expand Search), a computerised (Expand Search), a computed (Expand Search)
complex van » complex vapb (Expand Search), complex via (Expand Search), complex v (Expand Search)
nacl comb » nacl co (Expand Search), nacl co2 (Expand Search)
van ngoc » tran ngoc (Expand Search), ha ngoc (Expand Search), bao ngoc (Expand Search)
3 nacl » _ nacl (Expand Search), 3.5 nacl (Expand Search)
comb a » comb _ (Expand Search), comb m (Expand Search), comb n (Expand Search)
a now » a new (Expand Search), a non (Expand Search), _ now (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: (((( 3 nacl comb a now ) OR ( 3 nac56 complex van ngoc ))) OR ( j a computer's can new ))~.
• Adding a wildcard symbol may retrieve word variants: (((( 3 nacl comb a now ) or ( 3 nac56 complex van ngoc ))) or ( j a computer's can new ))*.