Perhaps you should try some spelling variations:
a demethylase » α demethylase (Expand Search), _ demethylase (Expand Search), o demethylase (Expand Search)
caso4 carlos » caso carlos (Expand Search), caro carlos (Expand Search), casal carlos (Expand Search)
carlos nora » carlos mora (Expand Search), carlos nara (Expand Search), carlos noa (Expand Search)
nacl caso4 » nacl na2so4 (Expand Search)
l collet » _ collet (Expand Search), c collet (Expand Search), l cole (Expand Search)
collet c » collet j (Expand Search), collet m (Expand Search), bollet c (Expand Search)
than nga » thanh nga (Expand Search), tran nga (Expand Search), phan nga (Expand Search)
0.9 nacl » 3.5 nacl (Expand Search)
c new » a new (Expand Search), _ new (Expand Search), c neu (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 collet c new ) OR ((( a demethylase complex than nga ) OR ( 0.9 nacl caso4 carlos nora ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l collet c new ) or ((( a demethylase complex than nga ) or ( 0.9 nacl caso4 carlos nora ))))*.