Perhaps you should try some spelling variations:
charles negrao » carlos negrao (Expand Search), charles nora (Expand Search), charles neal (Expand Search)
medial complex » medical complex (Expand Search), media complex (Expand Search), mediate complex (Expand Search)
complex bound » complex based (Expand Search)
colin note » con note (Expand Search), colin noyale (Expand Search), colin nogues (Expand Search)
nacl diehl » nacl diet (Expand Search), marcel diehl (Expand Search)
5 medial » 5 medical (Expand Search), 5 media (Expand Search), 5 mediate (Expand Search)
l combs » e combs (Expand Search), _ combs (Expand Search), l comps (Expand Search)
bound n » bound _ (Expand Search), bound a (Expand Search)
3 nacl » _ nacl (Expand Search), 3.5 nacl (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 colin note ) or ((( 5 medial complex bound n ) or ( 3 nacl diehl charles negrao ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l combs colin note ) OR ((( 5 medial complex bound n ) OR ( 3 nacl diehl charles negrao )))).
• Adding a wildcard symbol may retrieve word variants: (( j l combs colin note ) or ((( 5 medial complex bound n ) or ( 3 nacl diehl charles negrao ))))*.