Perhaps you should try some spelling variations:
method coupled » method compared (Expand Search)
coupled tris » coupled traits (Expand Search), coupled trans (Expand Search), coupled thin (Expand Search)
maria carlos » mario carlos (Expand Search), garcia carlos (Expand Search), maria carlota (Expand Search)
nucl maria » nuc maria (Expand Search), nucci maria (Expand Search), nucera maria (Expand Search)
carlos now » carlos noe (Expand Search), carlos noa (Expand Search), carlos novo (Expand Search)
comps con » compost con (Expand Search), comps los (Expand Search)
15 method » 15 methyl (Expand Search), 5 methods (Expand Search)
tris ngo » trips ngo (Expand Search), tri ngo (Expand Search), trinh ngo (Expand Search)
con net » con nee (Expand Search), non net (Expand Search), upon net (Expand Search)
3 nucl » 3 null (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 m comps con net ) or ((( 15 method coupled tris ngo ) or ( 3 nucl maria carlos now ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j m comps con net ) OR ((( 15 method coupled tris ngo ) OR ( 3 nucl maria carlos now )))).
• Adding a wildcard symbol may retrieve word variants: (( j m comps con net ) or ((( 15 method coupled tris ngo ) or ( 3 nucl maria carlos now ))))*.