Perhaps you should try some spelling variations:
chemistry chemical » chemistry physical, chemistry technical
chemistry specimen » chemistry sediment, chemistry special, chemistry specific
chemistry species » chemistry special, chemistry series, chemistry spaces

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 chemical)) ) OR ( advances in chemistry specimen )).
• Adding a wildcard symbol may retrieve word variants: (( advances in ((chemistry species) or (chemistry chemical)) ) or ( advances in chemistry specimen ))*.