Perhaps you should try some spelling variations:
molecular surfaces » molecule surface
specular surfaces » singular surfaces, stellar surfaces, regular surfaces
molecular states » molecular studies, molecular sieves, molecular scale

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: (( specular surfaces ) OR ( ((molecular surfaces) OR (molecular states)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( specular surfaces ) or ( ((molecular surfaces) OR (molecular states)) ))".
• Adding a wildcard symbol may retrieve word variants: (( specular surfaces ) or ( ((molecular surfaces) OR (molecular states)) ))*.