Perhaps you should try some spelling variations:
"advances in chemistry courses" » "advances in chemistry current"
"advances in chemical studies" » "advances in biochemical studies", "advances in clinical studies", "advances in classical studies"

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