Perhaps you should try some spelling variations:
visual regions » visual response, visual responses
time errors » some errors, runtime errors
best world » post world, best worst, next world
net world » next world, text world, net worth
neurons » neuronal

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) OR (best world)) time errors ((visual regions) OR (visual neurons)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "2008 ((net world) or (best world)) time errors ((visual regions) OR (visual neurons))".
• Adding a wildcard symbol may retrieve word variants: 2008 ((net world) or (best world)) time errors ((visual regions) OR (visual neurons))*.