Perhaps you should try some spelling variations:
"advances in chemistry sources" » "advances in chemistry courses", "advances in chemistry surfaces", "advances in chemistry studies"
"Advances in chemical studies" » "Advances in biochemical studies", "Advances in clinical studies", "Advances in classical studies"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Advances in chemical studies\") OR (\"advances in chemistry sources\"))".
• Removing quotes may allow a broader search: (( Advances in chemical studies ) OR ( advances in chemistry sources )).
• Adding a wildcard symbol may retrieve word variants: (("Advances in chemical studies") OR ("advances in chemistry sources"))*.