Perhaps you should try some spelling variations:
volcanic plume » volcanic plumes
volcanic glass » volcanic gases, volcanic ash
volcanic pipe » volcanic ridge, volcanic rises, volcanic river
volcanic lake » volcanic lakes, volcanic gases, volcanic ash

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: ((volcanic pipe) OR (((volcanic plume) OR (((volcanic lake) OR (volcanic glass)))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((volcanic pipe) or (((volcanic plume) or (((volcanic lake) OR (volcanic glass))))))".
• Adding a wildcard symbol may retrieve word variants: ((volcanic pipe) or (((volcanic plume) or (((volcanic lake) OR (volcanic glass))))))*.