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

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