Perhaps you should try some spelling variations:
hydrogel complex » hydrogel composed (Expand Search), hydride complex (Expand Search), hydrogels composed (Expand Search)
complex care » complex case (Expand Search)
neilan como » neilan tomas (Expand Search)
3 hydrogel » 3 hydrogen (Expand Search), 3 hydroxyl (Expand Search)
con china » en china (Expand Search)
china new » china's new (Expand Search), china na (Expand Search)
care ngos » care non (Expand Search), care now (Expand Search), care nhs (Expand Search)
g neilan » g neil (Expand Search), g newman (Expand Search)
como can » como canal (Expand Search), como canon (Expand Search), como cande (Expand Search)
can ngos » can ngoc (Expand Search)
l con » y con (Expand Search), _ con (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 l con china new ) or ((( 3 hydrogel complex care ngos ) or ( g neilan como can ngos ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l con china new ) OR ((( 3 hydrogel complex care ngos ) OR ( g neilan como can ngos )))).
• Adding a wildcard symbol may retrieve word variants: (( j l con china new ) or ((( 3 hydrogel complex care ngos ) or ( g neilan como can ngos ))))*.