Perhaps you should try some spelling variations:
metal complex » metal complexes (Expand Search)
carlos nodal » carlos vidal (Expand Search), carlos nava (Expand Search), carlos nejar (Expand Search)
tones neto » pontes neto (Expand Search), torres neto (Expand Search), fontes neto (Expand Search)
comes con » comes can (Expand Search), comes down (Expand Search), comes joan (Expand Search)
co carlos » fico carlos (Expand Search), caro carlos (Expand Search), cardo carlos (Expand Search)
l comes » l comps (Expand Search), l coles (Expand Search), l comas (Expand Search)
con net » con nee (Expand Search), non net (Expand Search), upon net (Expand Search)
5 metal » 5 methyl (Expand Search)
0.9 nac » 0.9 nacl (Expand Search)
nac co » vac co (Expand Search), bac co (Expand Search), nac cp (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 comes con net ) or ((( 5 metal complex tones neto ) or ( 0.9 nac co carlos nodal ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l comes con net ) OR ((( 5 metal complex tones neto ) OR ( 0.9 nac co carlos nodal )))).
• Adding a wildcard symbol may retrieve word variants: (( j l comes con net ) or ((( 5 metal complex tones neto ) or ( 0.9 nac co carlos nodal ))))*.