Perhaps you should try some spelling variations:
cobalt tris » cobalt trial (Expand Search), cobalt bis (Expand Search), cobalt thin (Expand Search)
nino carlos » cano carlos (Expand Search), bacino carlos (Expand Search), semino carlos (Expand Search)
carlos nara » carlos lara (Expand Search), carlos nava (Expand Search), carlos jara (Expand Search)
yl ethane » yl ethanone (Expand Search)
nacl nino » nacl nano (Expand Search), nacl kno (Expand Search), nacl mno (Expand Search)
tris ngo » trips ngo (Expand Search), tri ngo (Expand Search), trinh ngo (Expand Search)
7.5 nacl » 3.5 nacl (Expand Search), 0.9 nacl (Expand Search)
e combs » sex combs (Expand Search)
combs c » combs _ (Expand Search)
c net » c neto (Expand Search), _ net (Expand Search), u net (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 e combs c net ) OR ((( yl ethane cobalt tris ngo ) OR ( 7.5 nacl nino carlos nara ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j e combs c net ) or ((( yl ethane cobalt tris ngo ) or ( 7.5 nacl nino carlos nara ))))*.