Perhaps you should try some spelling variations:
image visual » images visual, primate visual, image vision
visual time » usual time, visual regime, visual types
iot world » lost world, art world
des image » des images, design image

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "2008 ((iot world) OR (post world)) des image visual time".
• Adding a wildcard symbol may retrieve word variants: 2008 ((iot world) OR (post world)) des image visual time*.