Perhaps you should try some spelling variations:
"advances in chemistry sources" » "advances in chemistry surfaces", "advances in chemistry studies", "advances in chemistry force"
"advances in chemistry current" » "advances in chemistry recent"

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