Perhaps you should try some spelling variations:
complex genes » complex gene (Expand Search), complex genetic (Expand Search)
cano carlos » luciano carlos (Expand Search), casiano carlos (Expand Search), bacino carlos (Expand Search)
carlos joao » carlos jose (Expand Search), barros joao (Expand Search), campos joao (Expand Search)
genes nif » genes nifh (Expand Search), genes nef (Expand Search), genes nirk (Expand Search)
nacl cano » nacl nano (Expand Search), nacl caso4 (Expand Search), nacl cacl (Expand Search)
5 clonal » 15 clonal (Expand Search), e clonal (Expand Search), o75 clonal (Expand Search)
0.9 nacl » 3.5 nacl (Expand Search)
l combs » e combs (Expand Search), _ combs (Expand Search), l comps (Expand Search)
combs a » coombs a (Expand Search), combs _ (Expand Search), combs c (Expand Search)
a non » _ non (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 a non ) or ((( 5 clonal complex genes nif ) or ( 0.9 nacl cano carlos joao ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l combs a non ) OR ((( 5 clonal complex genes nif ) OR ( 0.9 nacl cano carlos joao )))).
• Adding a wildcard symbol may retrieve word variants: (( j l combs a non ) or ((( 5 clonal complex genes nif ) or ( 0.9 nacl cano carlos joao ))))*.