Perhaps you should try some spelling variations:
chemistry specimen » chemistry sediment, chemistry special, chemistry specific
chemistry species » chemistry special, chemistry specific, chemistry studies
chemistry series » chemistry studies, chemistry sources, chemistry sars
chemistry spaces » chemistry space, chemistry stacey, chemistry surfaces
chemistry snakes » chemistry space, chemistry state, chemistry sars
chemistry erich » chemistry metrics, chemistry africa, chemistry ethics

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