Perhaps you should try some spelling variations:
complex trait » complex traits (Expand Search)
garelli carlo » garzelli carlo (Expand Search), girelli carlo (Expand Search), gabelli carlo (Expand Search)
combs john » coombs john (Expand Search), combes john (Expand Search), coombes john (Expand Search)
yl complex » gl complex (Expand Search), cl complex (Expand Search), fl complex (Expand Search)
trait ngoc » tran ngoc (Expand Search), tram ngoc (Expand Search), tra ngoc (Expand Search)
john net » john new (Expand Search), john neetu (Expand Search), john asnet (Expand Search)
7.5 nacl » 3.5 nacl (Expand Search), 0.9 nacl (Expand Search)
carlo na » carlo a (Expand Search), carlo n (Expand Search), carlo nasi (Expand Search)
l combs » e combs (Expand Search), _ combs (Expand Search), l comps (Expand Search)
5 yl » 2 yl (Expand Search), 1 yl (Expand Search), 4 yl (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 combs john net ) OR ((( 5 yl complex trait ngoc ) OR ( 7.5 nacl garelli carlo na ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l combs john net ) or ((( 5 yl complex trait ngoc ) or ( 7.5 nacl garelli carlo na ))))*.