Perhaps you should try some spelling variations:
chemistry department » chemistry experiments, hemisphere department, chemistry development
chemistry specimen » chemistry species, chemistry special, chemistry specific
chemistry sediment » chemistry experiment, chemistry experiments
chemistry series » chemistry species, chemistry studies, chemistry sources

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: %22advances in ((chemistry series) OR (((chemistry specimen) OR (((chemistry sediment) OR (chemistry department))))))%22.
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