Perhaps you should try some spelling variations:
metil complex » metal complex (Expand Search), metals complex (Expand Search), met complex (Expand Search)
complex some » complex snomed (Expand Search), complex scope (Expand Search), complex score (Expand Search)
carlos nejar » carlos negrao (Expand Search), carlos nava (Expand Search), carlos neri (Expand Search)
kcl carlos » akel carlos (Expand Search), gil carlos (Expand Search), del carlos (Expand Search)
combs con » combs colin (Expand Search), combs john (Expand Search), combs cody (Expand Search)
some non » some new (Expand Search)
0.9 nucl » 0.9 nacl (Expand Search), 1.9 null (Expand Search)
nucl kcl » nacl kcl (Expand Search), licl kcl (Expand Search)
l combs » e combs (Expand Search), _ combs (Expand Search), l comps (Expand Search)
con new » icon new (Expand Search), con nee (Expand Search), con net (Expand Search)
5 metil » 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j l combs con new ) or ((( 5 metil complex some non ) or ( 0.9 nucl kcl carlos nejar ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l combs con new ) OR ((( 5 metil complex some non ) OR ( 0.9 nucl kcl carlos nejar )))).
• Adding a wildcard symbol may retrieve word variants: (( j l combs con new ) or ((( 5 metil complex some non ) or ( 0.9 nucl kcl carlos nejar ))))*.