Perhaps you should try some spelling variations:
semino carlos » serrano carlos (Expand Search), bacino carlos (Expand Search), solano carlos (Expand Search)
complex trait » complex traits (Expand Search)
hat complex » heart complex (Expand Search), hat complexes (Expand Search), fact complex (Expand Search)
carlos note » carlos noe (Expand Search), carlos nobre (Expand Search), carlos nojek (Expand Search)
cols colin » coles colin (Expand Search), cole colin (Expand Search), combs colin (Expand Search)
colin new » coli new (Expand Search), colic new (Expand Search), colon new (Expand Search)
7.5 nacl » 3.5 nacl (Expand Search), 0.9 nacl (Expand Search)
trait a » trait _ (Expand Search)
e cols » e coli (Expand Search), e cole (Expand Search), e colo (Expand Search)
5 hat » 5 heat (Expand Search), _ hat (Expand Search), 5 htt (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 cols colin new ) OR ((( 5 hat complex trait a ) OR ( 7.5 nacl semino carlos note ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j e cols colin new ) or ((( 5 hat complex trait a ) or ( 7.5 nacl semino carlos note ))))*.