Perhaps you should try some spelling variations:
virtual neurons » visual neurons, virtual lessons, virtual notions
time across » time cross, time gross, time access
best worst » best first
die across » life across, rice across, edge across
net world » next world, best world, text world

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