Perhaps you should try some spelling variations:
chemistry specimen » chemistry sediment, chemistry special, chemistry specific
chemistry species » chemistry special, chemistry spaces, chemistry specific
chemistry sources » chemistry courses, chemistry surfaces, chemistry studies
chemistry series » chemistry studies, chemistry sars, chemistry seeing
chemistry ethics » chemistry metrics, chemistry methods, chemistry basics
chemistry erich » chemistry metrics, chemistry africa, chemistry eco

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 (chemistry sources))\") or (\"advances in ((chemistry erich) OR (chemistry ethics))\"))) or (\"advances in ((chemistry species) OR (chemistry specimen))\"))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((((\\"advances in ((chemistry series) or (chemistry sources))\\") or (\\"advances in ((chemistry erich) OR (chemistry ethics))\\"))) or (\\"advances in ((chemistry species) or (chemistry specimen))\\"))\"".
• Removing quotes may allow a broader search: (((( advances in ((chemistry series) or (chemistry sources)) ) or ( advances in ((chemistry erich) OR (chemistry ethics)) ))) or ( advances in ((chemistry species) or (chemistry specimen)) )).