Perhaps you should try some spelling variations:
visual regions » visual response, visual neurons, visual responses
nice worlds » ice worlds, nice words, life worlds
co primary » two primary, 3 primary, 4 primary
2008 nice » 2008 venice

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 nice worlds ((2 primary) OR (co primary)) visual regions.
• Adding a wildcard symbol may retrieve word variants: 2008 nice worlds ((2 primary) or (co primary)) visual regions*.