Perhaps you should try some spelling variations:
casado carlos » casiano carlos (Expand Search), castano carlos (Expand Search), castro carlos (Expand Search)
complex tran » complex trans (Expand Search), complex tehran (Expand Search), complex trait (Expand Search)
nacl casado » mal casado (Expand Search), raul casado (Expand Search), angel casado (Expand Search)
yl complex » gl complex (Expand Search), cl complex (Expand Search), fl complex (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)
7.2 nacl » 7.5 nacl (Expand Search), 3.5 nacl (Expand Search), 0.9 nacl (Expand Search)
l comps » m comps (Expand Search)
con net » con nee (Expand Search), non net (Expand Search), upon net (Expand Search)
ngoc » ngo (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 comps con net ) OR ((( 2 yl complex tran ngoc ) OR ( 7.2 nacl casado carlos now ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l comps con net ) or ((( 2 yl complex tran ngoc ) or ( 7.2 nacl casado carlos now ))))*.