Perhaps you should try some spelling variations:
"advanced in chemistry studies" » "advanced in chemistry study", "advanced in chemical studies"
"advanced in chemistry ethics" » "advanced in chemistry metrics", "advanced in chemistry methods", "advanced in chemistry basics"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced in chemistry ethics\") OR (\"advanced in chemistry studies\"))".
• Removing quotes may allow a broader search: (( advanced in chemistry ethics ) OR ( advanced in chemistry studies )).
• Adding a wildcard symbol may retrieve word variants: (("advanced in chemistry ethics") OR ("advanced in chemistry studies"))*.