Perhaps you should try some spelling variations:
virtual three » virtual threads, virtual thermo, virtual try
edges image » edge image, ages image, edges imaging
edge images » range images
iso world » ilo world, iosco world, two world
2008 iso » 2008 iet

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: 2008 iso world ((edges image) OR (edge images)) virtual three.
• Adding a wildcard symbol may retrieve word variants: 2008 iso world ((edges image) or (edge images)) virtual three*.