Perhaps you should try some spelling variations:
complex thanh » complex than (Expand Search), complex thin (Expand Search), complex things (Expand Search)
tail complex » oil complex (Expand Search), atrial complex (Expand Search), basal complex (Expand Search)
thanh ngoc » khanh ngoc (Expand Search), anh ngoc (Expand Search), thai ngoc (Expand Search)
kcl carlos » akel carlos (Expand Search), gil carlos (Expand Search), del carlos (Expand Search)
carlos noe » carlos nobre (Expand Search), carlos nojek (Expand Search), carlos n (Expand Search)
campo non » campo nos (Expand Search), campo ancon (Expand Search), campo novo (Expand Search)
0.9 natl » 0.9 nacl (Expand Search)
natl kcl » nacl kcl (Expand Search)
l campo » el campo (Expand Search), al campo (Expand Search), l campos (Expand Search)
non net » non nest (Expand Search), con net (Expand Search), non nef (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 campo non net ) OR ((( c tail complex thanh ngoc ) OR ( 0.9 natl kcl carlos noe ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l campo non net ) or ((( c tail complex thanh ngoc ) or ( 0.9 natl kcl carlos noe ))))*.