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