Perhaps you should try some spelling variations:
complex tran » complex trans (Expand Search), complex tehran (Expand Search), complex trait (Expand Search)
gl complex » cell complex (Expand Search)
kcl carlos » akel carlos (Expand Search), gil carlos (Expand Search), del carlos (Expand Search)
carlos noa » carlos noe (Expand Search), carlos nodal (Expand Search), carlos nava (Expand Search)
campo con » campo como (Expand Search), campo c (Expand Search)
tran ngon » trang ngon (Expand Search), tran ngoc (Expand Search), tran ngan (Expand Search)
con node » con note (Expand Search), wsn node (Expand Search), con nd (Expand Search)
l campo » el campo (Expand Search), al campo (Expand Search), l campos (Expand Search)
5 gl » 5 yl (Expand Search), _ gl (Expand Search), 5 il (Expand Search)
nacl » natl (Expand Search), nac (Expand Search), nucl (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 con node ) OR ((( 5 gl complex tran ngon ) OR ( 3.5 nacl kcl carlos noa ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l campo con node ) or ((( 5 gl complex tran ngon ) or ( 3.5 nacl kcl carlos noa ))))*.