Perhaps you should try some spelling variations:
specular surfaces » molecular surfaces, regular surfaces, irregular surfaces
singular surfaces » singular spaces, modular surfaces
stellar surfaces » stellar surface, steel surfaces, cell surfaces

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