Perhaps you should try some spelling variations:
"medicinal waterss" » "medicinal waters", "medicinal water", "medicinal writers"
"medicinal herbs" » "medicinal waters", "medicinal waterss"
"medicinal herb" » "medicinal waters"

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: (((("medicinal herb") OR ("medicinal herbs"))) OR ("medicinal waterss")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"medicinal herb\") OR (\"medicinal herbs\"))) or (\"medicinal waterss\"))".
• Removing quotes may allow a broader search: (((( medicinal herb ) OR ( medicinal herbs ))) or ( medicinal waterss )).
• Adding a wildcard symbol may retrieve word variants: (((("medicinal herb") OR ("medicinal herbs"))) or ("medicinal waterss"))*.