Perhaps you should try some spelling variations:
chemistry studies » chemistry study
chemistry species » chemistry specimen, chemistry special, chemistry series
chemical studies » biochemical studies, clinical studies, numerical studies
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 studies) OR (chemical studies)) ) OR ( advances in chemistry erich ))) OR ( advances in chemistry species )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( advances in ((chemistry studies) OR (chemical studies)) ) or ( advances in chemistry erich ))) or ( advances in chemistry species ))".
• Adding a wildcard symbol may retrieve word variants: (((( advances in ((chemistry studies) OR (chemical studies)) ) or ( advances in chemistry erich ))) or ( advances in chemistry species ))*.