Perhaps you should try some spelling variations:
chemistry specimen » chemistry sediment, chemistry special, chemistry specific
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 ( advances in chemistry sources ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( advances in ((chemistry species) OR (chemistry specimen)) ) or ( advances in chemistry sources ))*".