Perhaps you should try some spelling variations:
"advances in chemistry specificity" » "advances in chemistry specific", "advances in chemical specificity", "advances in chemistry electricity"
"advances in chemistry specimen" » "advances in chemistry species", "advances in chemistry sediment", "advances in chemistry special"

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 specimen") OR ("advances in chemistry specificity")).
• Removing quotes may allow a broader search: (( advances in chemistry specimen ) or ( advances in chemistry specificity )).
• Adding a wildcard symbol may retrieve word variants: (("advances in chemistry specimen") or ("advances in chemistry specificity"))*.