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