Perhaps you should try some spelling variations:
metal complex » metal complexes (Expand Search)
complex thin » complex than (Expand Search), complex within (Expand Search), complex three (Expand Search)
nino carlos » cano carlos (Expand Search), bacino carlos (Expand Search), semino carlos (Expand Search)
carlos nava » carlos navarro (Expand Search), carlos eslava (Expand Search), carlos zavala (Expand Search)
comps con » compost con (Expand Search), comps los (Expand Search)
nacl nino » nacl nano (Expand Search), nacl kno (Expand Search), nacl mno (Expand Search)
thin ngo » thien ngo (Expand Search), thinh ngo (Expand Search), thi ngo (Expand Search)
l comps » m comps (Expand Search)
con new » icon new (Expand Search), con nee (Expand Search), con net (Expand Search)
5 metal » 5 methyl (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 l comps con new ) OR ((( 5 metal complex thin ngo ) OR ( 3.5 nacl nino carlos nava ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l comps con new ) or ((( 5 metal complex thin ngo ) or ( 3.5 nacl nino carlos nava ))))*.