Perhaps you should try some spelling variations:
imagery vision » image vision, images vision, imagery fusion
vision theory » decision theory, action theory, dimension theory
world des » world does, world das, world de
2008 net » 2008 next, 2008 new, 2008 1st

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 net ((world debt) OR (world des)) imagery vision theory.
• Adding a wildcard symbol may retrieve word variants: 2008 net ((world debt) or (world des)) imagery vision theory*.