Perhaps you should try some spelling variations:
"advances in chemistry courses" » "advances in chemistry current"
"advances in chemistry ethics" » "advances in chemistry metrics", "advances in chemistry methods", "advances in chemistry basics"
"advances in chemistry series" » "advances in chemistry species", "advances in chemistry studies", "advances in chemistry sources"

Try widening your search to All Fields.

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: (((("advances in chemistry courses") OR ("advances in chemistry ethics"))) OR ("advances in chemistry series")).
• Removing quotes may allow a broader search: (((( advances in chemistry courses ) or ( advances in chemistry ethics ))) or ( advances in chemistry series )).
• Adding a wildcard symbol may retrieve word variants: (((("advances in chemistry courses") or ("advances in chemistry ethics"))) or ("advances in chemistry series"))*.