Perhaps you should try some spelling variations:
carlos ayala » carlos adam (Expand Search)
complex thin » complex than (Expand Search), complex within (Expand Search), complex three (Expand Search)
pal complex » al complex (Expand Search), apical complex (Expand Search), basal complex (Expand Search)
campo con » campo como (Expand Search), campo c (Expand Search)
thin ngo » thien ngo (Expand Search), thinh ngo (Expand Search), thi ngo (Expand Search)
l carlos » gil carlos (Expand Search)
l campo » el campo (Expand Search), al campo (Expand Search), l campos (Expand Search)
con new » icon new (Expand Search), con nee (Expand Search), con net (Expand Search)
nacl l » nacl _ (Expand Search), nacl a (Expand Search), nacl e (Expand Search)
5 pal » 5 palm (Expand Search), _ pal (Expand Search), k pal (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 new ) OR ((( 5 pal complex thin ngo ) OR ( m nacl l carlos ayala ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l campo con new ) or ((( 5 pal complex thin ngo ) or ( m nacl l carlos ayala ))))*.