Perhaps you should try some spelling variations:
chemistry specific » chemistry specificity, chemistry special, chemistry specimen
chemistry species » chemistry specimen, chemistry special, chemistry series
chemistry sources » chemistry courses, chemistry surfaces, chemistry studies

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 species) OR (chemistry sources))\") or (\"advances in chemistry specific\"))".
• Removing quotes may allow a broader search: (( advances in ((chemistry species) or (chemistry sources)) ) or ( advances in chemistry specific )).