Perhaps you should try some spelling variations:
chemistry specimen » chemistry sediment, chemistry special, chemistry experiment
chemistry specific » chemistry specificity, chemistry special, chemistry scientific
chemistry species » chemistry special, chemistry series, chemistry spaces
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 specimen))) OR (chemistry sources))\") or (\"advances in chemistry specific\"))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"advances in ((((chemistry species) OR (chemistry specimen))) or (chemistry sources))\\") or (\\"advances in chemistry specific\\"))\"".
• Removing quotes may allow a broader search: (( advances in ((((chemistry species) OR (chemistry specimen))) or (chemistry sources)) ) or ( advances in chemistry specific )).