Perhaps you should try some spelling variations:
chemistry courses » chemistry current
chemistry studies » chemistry study, chemical studies
chemistry series » chemistry species, chemistry sources, chemistry erich

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 courses) OR (chemistry studies))\"))".
• Removing quotes may allow a broader search: (( advances in chemistry series ) or ( advances in ((chemistry courses) or (chemistry studies)) )).