Perhaps you should try some spelling variations:
"advanced in chemistry surfaces" » "advanced in chemistry surface", "advanced in chemistry sources", "advanced in chemistry space"
"advanced in chemistry studies" » "advanced in chemistry study", "advanced in chemical 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: (("advanced in chemistry studies") OR ("advanced in chemistry surfaces")).
• Removing quotes may allow a broader search: (( advanced in chemistry studies ) or ( advanced in chemistry surfaces )).
• Adding a wildcard symbol may retrieve word variants: (("advanced in chemistry studies") or ("advanced in chemistry surfaces"))*.